Update on my post-Valentines fiasco

I had a most in r/relationships that was deemed "inappropriate" for that sub, so I'll post the original post and update post here since so many people have messaged me for an update.

ORGINAL

How fucking cliché ironic this fucking happens right after Valentines? We were suppose to go to my best friend's (B) birthday party last night, but she (L) said she felt sick. I told her I could stay and take care of her, but she refused then told me she'll be fine and to go without her.

It was my best friend's 21st birthday, so I decided to go. I wanted to get slammed with him, but I decided not to drink and come home drunk off my ass to my sick girlfriend. Half way through the night we were giving him gifts and I remembered I left mine at home. I told B I'll be right back and left.

I dropped by the store to buy some Nyquil for L and headed home. I called her on the way to grab the present for me, but she didn't pick up. It was like 11pm so I assumed she just went to bed. When I got home, I saw the bedroom light was still on, but didn't really think much of it.

I entered the house quietly, grabbed the present on the counter and was about to walk out, but remembered the light was on so I went to the bedroom to turn it off while she was sleeping.

I open the door and I see some guy on top of her with her legs wrapped around him. I just stood there with my heart in my stomach. L saw me and as soon as our eyes met I walked out. Went to my car, threw B’s present in, and drove off.

When I finally got back to the party, I took B’s personalized shot glass out to see if I broke it… I did. I walked in in tears with the broken glass in the box. I grabbed the closest alcoholic beverage I could find and drank. B asked what's wrong and all I said was I'm thirsty. Everybody left at 2am and I told B everything.

I woke up a couple hours ago with the worst fucking headache. I'm still nauseous as I'm writing this. B is still passed out from last night. I turned my phone back on to recieve at least 36 texts, 15 missed calls, and 6 voicemails. All from L.

I don't really know what to do right now. She's my first ever girlfriend. Period. She was my first everything, I guess now my first ex too…

TL;DR came home to get best friend's birthday present, walked in on girlfriend fucking some dude I don't even know

UPDATE

First off, thank you all for the advice. I'm gonna try to get over this hangover, until then she can stay at the house for another day. I'll keep you guys updated <3. Thanks again for the support.

UPDATE2

Now that I'm mostly sober, I decided to check those messages and voice mails. Pretty much all of it was "Dan... please call me back, I love you, I'm sorry". I still haven't sent her anything. I can barely hold it together here on B's couch. I keep listening to the voice mails and having her face in my mind and all I can think about is her and that guy.. I can't take it. I deleted the voice mails so I'm not tempted to listen to them again. If I'm breaking down just listening to her voice mail, I have no idea how I'm gonna react in person.

B offered to let me stay at his house for a while, but I want to be in my house and in my bed... well maybe not the bed anymore... I still have that fucking Nyquil. It's there taunting me, reminding me of how fucking stupid I was to believe her. Even after all this.. I still love her.. or at least I think I do... She was the first who actually seemed to care about me. She was the only one who got me out of my shell. Fuck I'm crying again. I hate this. I have no idea how I'm going to tell my dad about this. He was so happy for me when we started dating. I don't know what went wrong. I tried being the best boyfriend I could be. I thought she loved me..

Sorry about the rambling. Writing down my thoughts keeps my mind sane. Well I gotta clean myself up and try to man up. I'll be heading home in an hour or two. This is going to suck. I'll update when I can. Thanks again for all the support <3

---

UPDATE

It took a lot for me to get home on my own, but I finally sucked it up and went. When I got home, but I didn't see her car there. I have no idea where she went. I was dreading the moment she’ll be home and I’ll have to face her. I went into my bedroom and was about to sit on the bed until that image flashed in my head again. so I just shook it off and just went to the living room to sit on the couch.

I’ve been trying to understand why she did what she did. The only thing I could think of is that we haven't been having sex as much as we did in the past. It's not like we stopped completely. We just don’t do it every day like we used to, it’s more like 3 or 4 times a week at most now. It’s not that I don’t find her attractive anymore, not at all, I just don’t feel the need to have sex every single day; but it's not like I’m refusing her every single time either.

After a lot of deliberating, I decided to let my dad know what happened. I called and told him L cheated on me. He asked for details but I just said “I just wanted you to know, I don’t really want to talk about the details over the phone right now”. Dad said “alright son, do what you think is best. Just call me if you need me alright?”. I thanked him and hung up.

My sister immediately texted me after that. “WHAT. DID. SHE. DO?” I responded she cheated on me that’s it. “I'm coming over don't you fucking go anywhere”. I guess sis was at dad's when I called. I knew she'd be here in like 20 minutes so I just waited. She arrived nearly an hour later, with chinese food for the both of us; I don’t know why she did, I guess she was hungry. She invited herself inside and put the food on the coffee table. “sit down, we're talking about this” so we did. It doesn’t take long for my big sis to get me to spill everything. She was so pissed off, but she said she was glad I didn't do anything to land myself in jail. She just hugs me and says she’s here for me. Which was surprising considering my sister isn’t the kind of person to touch people, let alone hug them.

My sister and I just sat there and hung out for awhile until we heard a car pulling in. It was L. My sister just stared at me. L walks inside with a small suitcase. “... I'm sorry.. I'll be out of your hair as soon as possible.” she hesitates and looked like she was about to say something else, but stopped and walked towards the bedroom instead. I tell my sister to leave so I could be alone with L to talk. She was strongly opposed to that, but I was pretty firm with her on this one; so she reluctantly left.

I walked to the bedroom, but stopped at the door. I had so many questions I wanted to ask, but I couldn't get any words out. What could I say? The woman I loved and who I thought loved me back stabbed me right in the heart. I’m not sure why she did it, logically I shouldn't care. The fact she lied to me so she could fuck a dude means we're through, right? But I just can’t help but want to know, I want my closure.

I took a deep breath and walked in. L had her suitcase on the bed and she was in the closet getting her things. She walked out and was startled by me. She looked she’d been crying. “where’s your sister?” as she was wiping her eyes. I told her I made her leave so we could talk alone. I asked her where she’s going to be staying. But she was silent. I asked again, “.. I mean.. DO you have a place to stay?”

Finally she breaks the silence. “I know that you probably hate me right now, and this apology will mean nothing to you.. but I’m sorry. I know there’s nothing I can say for you to forgive me, what I did was unforgivable. I don’t want you to think it was because of anything you did..” I didn’t know how to respond to that. I just stood there staring at her. She continues with tears in her eyes. “..you were the best thing that ever happened to me and I ruined it... “ I was holding back my own tears at this point. “.. I am so sorry.. I really am… I was so stupid...I……... I’m going to stay at my sister’s until I can find my own place to stay. I don’t want to be here and be a constant reminder of the pain I caused you” I couldn’t hold it in any longer. I just broke down and started crying. I was a mess.. so I didn’t notice her heading towards me. She just walked up to me and kissed me. It was so bittersweet, this will probably be the last kiss we’re going to have as boyfriend and girlfriend, I just accepted it. Once we stopped, she finished packing and left.

There’s still a lot of her things still here in the house. She texted me yesterday saying that she’ll come over on Saturday to pick up the rest of her things. I guess that wraps things up on possibly the worst Valentine's week I’ll ever have. Sorry it took so long to give an update, it’s been a long week.

TL;DR I got home, L wasn’t there, told dad and sis about the cheating, L got home, we kissed and broke up.