I feel like I’m going crazy from overthinking

Today is the third day of me being left on delivered on everything. Me and her have been dating for two months now, and everything has always being great between us, we had plans for our future and she was even the one to bring the idea of getting married. The day of her sending the last message we had a little argument about a thing that happened couple days ago. She was walking her dog out late like she does most of the times at 11pm, and we were talking about something while she was walking the dog and then after a while she didn’t text back for 30 Mins, which is ok and then she texts me back at home saying there were people in a car following or looking at her (something along those lines) and said they really liked her dog and wanted to pet her. Which is also fine with me because her dog is a very beautiful breed and she gets compliments often, but the part that i didn’t like was it was basically midnight and she was talking to 3 strangers, 2 of which were adult guys for 30 minutes. She is 16 btw. I told her i didn’t like her doing it, i said i get that she gets compliments and they were talking but it was so late and why did it have to be so long ? Then she said oh why would i cheat when i have you, i love you etc.. i said it was mainly for her safety but she didn’t believe it, acting like i was overreacting. So on the day of her last message we were arguing about something and she was being very aggressive for something so small and not important then brought up this thing. She said “you told me I’m cheater 50 times and it pissed me off so much” and “you said your were ok with me having male friends until you changed your mind and went ballistic at me for talking to my friends who i knew before you”. It really broke me. First of all i never called her a cheater for talking to people at night i just said i don’t want you to talk to guys so late and its also not safe to be doing it, what if they just put you in the car and i would never see you again. And I did say she can have male friends i don’t mind but the one she was referring to on the second quote was a friend that confessed to her, and even after she rejected him, he still asked again after couple months. So i said i don’t mind you having male friends but just don’t talk to this guy because he likes you and clearly still has feelings for you, AND SHE WAS TOTALLY OK WITH IT when i told her to block him she instantly did no questions asked. So after she brought these up and i clearly explained how she was changing my words, she completely ignored my replies because she was busy typing some other small things aren’t even worth mentioning. At this point i was quite sure she was making excuses to probably break up with me, she said “give me a bit” and “let me cool down”. After 5 hours she sent a picture of her dog looking at the parking lot where we usually meet. I replied “is she looking for me” and i was going to sleep so i said “goodnightttt, i love you,😘😘😘” like always. She replied at 2 am saying yes (her dog was looking for me) and just plain “goodnight”. And that was it, her last messages. I woke up the next day and see she only said those, i said Goodmorning and then at lunch she still hasn’t replied which NEVER happens, so i was confused thinking shes busy. I checked her profile if she blocked me or something and i see that she removed my initial from her bio and my picture, my heart sank. I messaged her lots of things, no response, then again after couple hours, nothing, then again after hours and still nothing. At this point she hasn’t blocked me, unfollowed me, or change the matching profile pictures we had. I was very confused, its was like a half break up. Being left on delivered not knowing if she even sees my messages and NOT being blocked made me overthink everything. Why wouldn’t she just say she wanted to breakup ? What happened, just a couple days ago she gave me gifts with a big letter of nice things and even had my last name next to her name at the end. Why didn’t she block me if she was breaking up ? Or unfollow ? After texting her again many times and being left on delivered I removed my matching pfp and unfollowed her and removed her as a follower. I still messaged her again on instagram and couple other apps we used to talk from and they are all delivered but never blocked. After couple hours i checked her profile to see if she blocked me, she still didnt but removed her matching profile picture. So that means she has opened instagram but havent looked at my messages but removed her pfp cuz i did. Today is the third day and still nothing from her, i don’t know what happened, everything was perfect couple days before and it all turned upside down like my life. I told her many times “atleast tell me what happened, i will leave you alone”. I even told her i had suicidal thoughts. Now I’m overthinking all the time cant do anything else, i don’t have any appetite, i cant even sleep. My heart is burning and being stabbed constantly. And still nothing. The only reasoning that comes to my mind is that she found someone else but even then just tell me you want to break up. I dont know if she muted my messages on every app or she seeing them from notification centre and shes actually a horrible person. I was there for her so many times when she told me about her past where bad things happened to her and how she was bullied or when she had bad things within the family. She was crying in my arms last week. She begged me to not go to uni which was far and i wouldn’t see her much and then the gifts. Ive never been this confused, depressed and angry at the same time. I WAS THERE FOR YOU AT YOUR LOWEST SO MANY TIMES AND THE ONLY TIME I NEED YOU IS WHEN U ARE THE ONE BREAKING ME.

Im sorry if it was hard to read, english isn’t my first language and this is my first time posting in reddit. Thank you for reading.