Is it normal this still bothers me?

I haven't talked about it in a while, but last year I became very paranoid. There was a girl I was friends with from school who I had a crush on, and she had started driving even though she expressed fears about it, and I became scared for her. It's hard to explain, but she gave off a very vulnerable feel. The thought of her getting hurt was the worst thing imaginable to me, and my school's nonstop reminders of how dangerous driving can be, and her repeating the fact she wasn't very good at driving, definitely didn't help. Someone once said that what's probably going on here is her making a mature decision that I didn't, and that may be true. Long story short, we've both graduated high school and haven't talked in a while, plus she has a boyfriend but she knows I had feelings for her. I don't think about the whole driving thing as much as I used to, but I must admit I'm still nervous for her. She's very hyperactive, and short, and acts childishly sometimes, although she could be serious when she needed to. I think I may be embarrassed she's braver than I am, especially with the stereotype that men are bigger risk takers. It's not like I'm obsessed with her, but I have to admit that even all this time later I may not have gotten over her 100%.