I don’t know what to do..

I just need somebody’s opinion on this, I’m 15 and I’ve been with my boyfriend for 6 months now. I really like him and I want to have sex with him and I’m sure he does with me too. The thing is he has been off with me lately after I got hilariously drunk at a party, and hasn’t been very affectionate since (it was almost a week ago). He opened up to me about thinking about breaking up.

The thing is, I’m not sure if I’m telling myself I want sex just so he’ll stay with me or if I actually want it. It’s really dumb I know I just need some other people’s opinions on what they would do in my situation.