Couldn't sleep last night

For some reason I kept thinking about the past, particularly on my first girl crush...It was such a random thought, I was just remembering how I couldn't stop thinking about them and how I always wanted to be closer...and how I would make excuses just to be closer to her. It was a crazy moment for me, and I still don't know why I was so heads over heels over her. I wonder if I was exaggerating too much. I mean now i don't see her like that, but I still can't understand why I was attracted to her. That's why I couldn't fall asleep, I was relieving every moment I had with her and wondering why...i'm still not sure why.