boyfriends

why does my boyfriend get so mad when i hang out with people who do drugs? just because they do drugs doesn’t mean we can’t go to the movies or get food like normal people.. i’m going to college orientation with my friend and he started a fight with me and told me to “have fun hanging with a crackhead” like why does he get like this?? it’s not like he has never hung out with people who have some drugs or smoked weed either?? he says i fall under peer pressure but that doesn’t happen?? (i don’t do drugs btw)