Boyfriend partying/drinking

So I'm normally not allowed to go out because my parents are super strict. I'm 17 and my boyfriend is 18. He goes to parties every weekend. And while on break he has gone to one every night. I get jealous because I'm not allowed to go, and I trust him, I just get scared about other girls. I just wish I was able to go. And I end up just being a complete bitch to him because I'm upset. I don't mean it but it's just how I handle it. Anyway can Yall give me any ways for coping with the situation?