Hope,

I've been there. I've fixated on someone (two years ago) and it drove them away. They never reciprocated my feelings anyway, but the pain I went through was one of the best things that ever happened to me. I think it's best if you begin to detach from him completely. Do not contact him anymore. If you truly care about him, you wouldn't force him to interact with you. The declined FB request was a big flag

My concern is how you are deflecting everyone who asserts that maybe you are fixated on him. You usually retort with a musing of your own, usually self-deprecating. Is this a defense?

Please, begin to let him go. Work on yourself. He is not going to solve your problem.