The first crush I had was in fifth grade at church. We'll call her Bridgett. Bridgett was very attractive and was nice to me (which was a strange thing because I was a fucking weirdo for the longest time). Anyways, I wrote her a letter like a creeper and she giggled it off (5th grade mind you). Got over her and one of my buddies starts dating her a couple years later. Turns out she's a fucking psycho. He doesn't like this too much and tries to break up with her and she says that she'll run away and kill herself. She did in fact run away, but I find out about 6 years later that she did not kill herself. I just graduated high school and go to my new dentists' office and set up an appointment and the receptionist calls me a few days later to confirm the appointment. Who is the receptionist? Yup. Anyways, she's smoking hot now and I'm not a creeper/weirdo anymore so I ask her out to coffee. Worst. Decision. Ever. Turns out she's still crazy (and a huge slut). She wants to murder all the old church girls for no reason other than they had the audacity to be prettier than her. Nope, nope, nope, I got the hell away from her and haven't contacted her since then. Fun times.
Edit: I want to explain my current crush. We'll call her Kelsey. Kelsey and I were assigned to the same bus seat when I was in 7th grade, she in 6th. I was an asshole to her. Constantly berating her choice in books and whatnot and I even smashed her head in the window once. I don't know why I was like this to her, I didn't do that to anyone else at all. Anyways, she moved after that school year to another state to attend a boarding school (I have no clue why I just hope it wasn't because of me). 11th or 12th grade I stumble upon her myspace page. She's pretty damn attractive by this point. She remembers me but doesn't hold a grudge but she seems to be pretty bitter with life (maybe a phase) and we quit talking. Now last year, I was 23 and I find her facebook page. She's smoking hot now. I'm not sure if she remembers me but we start talking a bit and I come to find that we have a lot in common and she has an awesome personality. She's still living a state away and I'm pretty sure I don't have a chance with her. That's ok, I just want to apologize to her in person for all the shit I did to her. I'm glad that she's pretty happy now.