would you still try to get with a guy that has a girlfriend 😓😤😫

I'm really worried about my boyfriend being off at college and a ton of drunk girls at parties constantly trying to grind ignoring the fact that he has a girlfriend which seems like a frequent trend. A lot of girls in college from what I've seen disregard the fact at all a boy has a girlfriend and even if they say no repeatedly they will still try and even go as far as to touch and hang all over guys. My boyfriend has totally left the situation every time but I'm very angry and annoyed so my question is do you ladies take into account if a guy has a girlfriend at a party or do you ignore it and persue him anyways or do you think it's just that girls are really drunk.