fuckable or unfriendable

Hether
I've been having a problem for the past two years I've been at college. I'll go out and meet people, talk to them for extended period of time and really feel like I've hit it off with them. But later they ALL show interest in me sexually, and most of the time it isn't reciprocal. Then they get pissy or hurt that I won't go home with them. Can I ever meet someone and simply become friends with them without fucking them? I have no friend in this new town because of this. Do you think I could be sending accidental messages about sex that I'm not catching or is it just because women have been so hyper sexualized we can't be anything more than that in their eyes? I'm lost on what to do and I'm really tired of hanging out with a 'friend' then getting pinned in a corner and having to force my way out in order to get home without getting fucked.