Hm....
I myself am something of a loner. I have my interest which have been condemned. I would rather be alone then conform simply to fit it. I like metal, I'm into anime with people getting their heads cut off, Vampires, Swords, Guns, morbid sense of humor and reading good books.
Most people in highschool thought I was on drugs just because, I was different. I don't like being alone however, I'd rather be myself then pretend I like things I don't like to fit in and get along with others. Hell I can get along with people who have nothing in common with me so long as they aren't into things solely because "its popular" and they can fit in for the moment.
With that being said. I can relate. I' 19. My first "girlfriend" was an obsessive compulsive liar who deluded herself into believe she was rich and attractive. The second girl I liked didn't like me back and let me lead myself on for a long time. My last actual girlfriend had agoraphobia, multiple other issues. And then decided she just "didn't like me like that" and wanted to be just friends. I was cool with it. Then later on she just apparently decided she didn't even want to be friends at all.
I've been seriously interested in 3 girls all of which had serious emotional or mental issues. (depends on how you want to look at it). Any other girl I have liked shot me down, turned out to be someone I really didn't get attached to and disliked to the point we never actually went outor spoke outside of school. I'll probably pay a toll for that sooner or later >.