cheated on my bf of three years and got shamed by his whole friend group

Okay so I (18F) and my boyfriend (23M) were having problems in bed for a while now. He and I didn't have sex at all during the week, and barely on weekends, where we ended up going one round missionary. 

Well last week we went to my boyfriend's cabin in the mountains for a quick an easy vacation, I was the only girl invited since his friends are all single, and that made me a little uncomfortable but still I decided to go. On the second day there I wanted to get fucked, I was really horny especially after I saw all his friends in their swimsuits. But my boyfriend blacked out drunk and fell asleep.

His bestfriend, who we'll call Tommy, saw my frustration as I tried to wake him, and we started talking and moved to my room. I vented to him about our sexual problems and being a little tipsy about my need of cock too and how small my bf is.

Tommy told me I turned him on, I asked him if he wanted me to deal with it and he told me to get on my knees and suck him dry, which I did, and after he came all over my face. 

The bathroom was across the living room, I didn't have to clean so I just decided to take a shower, what I didn't expect was to have all the rest of my boyfriend's friend group chilling on the couch. I was backing away but Tommy told me to keep walking and I immidiately got horny as they started to whistle and call me a slut. 

I had to beg them not to tell my bf, and well, they told me yes if someday I could give them a show. I still do not know what that means, but after I washed and slept with my bf.

It's been a week, we're staying another week in the cabin and my bf is gonna drink tonight, I have a feeling that the favor is gonna get claimed.