I know exactly how you feel, everything you say is what I've said before, especially the feeling like I'm the one that always has to say hello, that no one comes to me first, and it's definitely really lonely. I actually deactivated my Facebook because I was so tired of no one talking to me. I'm sorry I have no advice for you, just know that there are others out there that can empathize with how you're feeling, and that I hope it gets better for you someday.