I cheated on my boyfriend last night?

I got drunk last night, well wasted. My boyfriend went to another province for the weekend, and I had gotten invited to this party so I went. I wasn't planning on getting that drunk and alcohol just kept coming and of course I accepted. I was taking pictures and everything and guys were trying to hit on me, and didn't phase me at first until my friend was trying to give me the talk and which got me mad. Getting drunk and having these types of conversations are not a good mix, it kills the fun. But, as I was getting drunker this guy kept getting closer to me and was pushing him away and trying to avoid him and I had so much people have my back. Then when everyone suddenly disappeared on me, he started making his moves again then I blacked out and next thing you know, were making out but I kept pushing him away. We didn't have sex but he kept asking for it. Then I reached a point on what I was doing and went to go to sleep, next morning, this morning having flashbacks on us making out are just haunting me. I care for my boyfriend a lot, I was reaching a point on falling for him nd now I feel like a monster. What do I do?