I wouldn't tell him unless you've been in a relationship with him for a while. I dated a guy my freshman year in college and he was a partier which led to trouble. I'm edge too since I'm sort of into the hardcore scene so dating a partier wasn't ideal for me. Telling people at our age of a mental illness is a big no because if you tell the wrong people they will tell everyone or worse they will use it aggainst you. My ex told all of his friends that I was bipolar aka "crazy" so I got shunned by a lot of people.

With the partying, tell people you don't drink and they should leave you alone if you tell them you're edge. I always drink juice and people don't question my actions. I also don't go to parties all the time since it's not my scene/style so people understand that if I go to a party it's because of someone's birthday or some sort of occasion. Btw if you feel left out in college join a sports team or a club, I was an active member in The Wildlife Society and I enjoyed it a lot.