This kind of thing happens to me all the time, I don't really know exactly what causes it, but it doesn't really happen when I listen to any songs. There isn't really anything you can do about it, you can't control your feelings or who you crush on.
This happened with 2 guys, one my age who I've known since Grade 7, nice, funny, very mature for his age, we have always been on good terms. We talked a bit in middle school, but he never talks to me anymore. The other guy was 2 years older than me, really nice, funny guy. We would talk a lot, then I didn't see him for a while. Then a few months later I was looking through his Facebook, and I found out he had a girlfriend my age. Worst day of my life.
The feelings for both keep coming back.
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F.A.I.L. is just the First Attempt in Life.....
^_^