I've definitely liked people who were obviously unavailable/didn't like me back.
Two years ago, it was this guy had a girlfriend. A girlfriend who obviously didn't appreciate his humor. Then I realized that I didn't know him well enough to actually like him.
Last year, I absolutely adored this guy. I've liked him on and off since like grade.. 4? (As in he was like my second crush). Anyways, I spent a lot of time with him in class, and I wanted nothing more than him. I hate breaks like Xmas, and March break because I didn't ever get to see him. I realized though that he had no interest in me at the last dance. He danced with almost everyone in my circle, and hardly even noticed I was there.
Anyhoo, I've grown apart from him now, so we're just kind of good friends. He's still amazing, friendly and gorgeous, but I just don't like him in that way anymore.
Right now I like this random kid who I have no classes with, and I don't get to talk to often. My friends under the impression he likes me back, but I totally disagree with her. Because she's my friend she wants me to be happy, therefore makes up complete crap with complete crap evidence.