For context, my boyfriend(31 m) of 4.5 years rarely has a night out...but when he does, he usually does it in the most extreme ways. He likes to go drinking with his buddies and stay up all night, and most often then not, likes to do drugs (lsd, mama, 2cb, marijuana, etc) and likes to mix. I don't mind him going out but I just don't want him to mix. We got into an argument about it because he only does this like once or twice in a year and just wants to have a good time. I'm not against him having a good time, I just don't want him to mix substances. I don't feel safe with that and it makes me feel anxious. Am I overreacting?