My first crush was a girl at school, a classmate. Her name was Sharon (hey Angel! I bet it was you, no?). It wasn't really a success at first; she was the popular one with the big boobs, and I was the nerd because I loved to play games *rolls eyes*. She had a big mouth towards the teachers too.
That changed when we were two years further – she had matured and so had I (well, as teenagers anyway). She didn't have a boyfriend at the time I asked if she wanted a relationship. Fortunately, otherwise I probably would've been DEAD MEAT (pun alert). We did have sex, but not safe unfortunately; we weren't precisely... informed a lot.
My second crush (well, for a long time really, as he is my best friend since I was 4), Martin. I kind of liked him a lot, although not in a sense of a true romance or any of such, oddly enough. Just as a sex thing I guess... yeah, being teenager in combination with horny doesn't really fare well.
Third crush was another boy, Nick. He was a classmate as well, although I never got to ask him (he was straight and had a girlfriend), and haven't seen him either since 5 years ago or so, as he quit that study and went for the military.