Wow, most of these facts are really depressing, I had no idea :/
Well I really am no expert but I read through the end notes and quite a few of the sources seem to be very reliable, like official surveys and commission reports. However, most if not all of the sources are from the 80s or 90s, since then I think the situation of gays in the U.S. has probably improved quite a bit (right? :unsure: )
As for the OP you have already received lots of advice and don't really know what to suggest. I do know that it is hard to be firm with friends who are flirting with you when you're not interested. All I can say is, don't let the situation remain the same by being too patient with him, it won't do him any good to have hope you'll change your mind. Regardless of him being gay, friendships can be destroyed when one of the friends like the other in a way that can't be reciprocated (speaking from personal experience here).
Agreed, every word.
The earlier advice about just cutting him off until he behaves is one I'd echo. I know it's really hard to be friends with someone you have an unreciprocated crush on, but it's something he's just going to have to deal with, as do most human beings in their lifetime regardless of sixual orientation. It's about him respecting your boundaries. Yes, it's hard for him to deal with because he's facing feelings of loneliness, rejection and a physical longing for romantic connection with another person, and all that is
entirely normal. As said, it's really no different to him being a lonely girl with a crush on you - it's still unwanted attention from someone you don't want to drop as a friend.
I'm sure as soon as he finds himself a boyfriend, he'll forget all about you in that way and stop creeping you out. So, in addition to backing off from him and/or avoiding situations where you're both alone, un-subtly push him in the direction of gay message boards and get him in touch with other people who
can reciprocate his feelings.