Lonely bi guy too eager to please?

If you can give me some advice on how to convince a guy friend who I've had fun with to have fun with me again (I've blown him twice but some has elapsed and he says he isn't bi "anymore") that would be greatly appreciated. I doubt anything will work because it is unlikely he is or ever was attracted to me (I let him watch str8 porn both times; that's how he got hard). If you're interested in some IM fun I'm 18, male, and you can add me on YIM: sheisalsoasinger@yahoo.com. We can trade pictures of celebs/porn/sexy people we know/ourselves if you're down :).