He cheated

I'm 16 and I've been with my boyfriend 2 years. We are in school together and he's part of the popular group, they all invite the same people to house party's at different houses. I'm never invited because I'm not very popular and I like to keep to myself. I also don't feel comfortable around popular girls so I'd feel intimidated if I went, I also don't drink. A month ago he went to a party and get very drunk and stoned and cheated on me. He kissed and made out with another girl. There's another party coming up with the same people who are invited. He wants to go only for a couple of hours and sleep round mine after. I don't really want him coming round mine drunk as hell and I'm not comfortable him going to the party but I don't want to be controlling or make him annoyed at me for telling him that i don't want him to go. What do I do?