<human>: Condense the text into a few key points

As a relatively solitary person at college, I met this friend simply out of chance as he was the only person who bothered to talk to me. It just so happened that he is openly gay which I assumed wouldn't be a problem. But I quickly realized he was becoming overly affectionate and just generally expectant of me as if I owed him something or that our relationship was worth a lot more than it is to me. He has never been in a relationship so I feel a sense of responsibility to avoid being too harsh, but the levels of expectation and his attentions towards me are beginning to make me more than uncomfortable. The problem is that I see him all the time at college as we're in the same class but because of my self imposed isolation from everyone else (and mostly from him) he seems to have categorized me as 'his.' I have tried to ask him to respect my boundaries where I identify them but he seems to relish in the idea of breaking that boundary. I find infatuation disturbing. How can I get out of this situation without gaining a stalker (as he seems to be that type) and without destroying him emotionally?
<bot>: My gay friend is infatuated with me, how can I reject him and set boundaries in how hes behaving without ruining him emotionally and in his general confidence?