I had a crush on this one really cute girl from when I met her in sixth grade until we left for college. I bumped into her at a bar when I was like 22. Chatted her up for a while, got her number. Called her a few days later to see if she wanted to go out, she said she was busy. Gave her my number and said to call me if she had some free time.
Never heard from her. But at least I gave it a shot, so I don't always have that "I wonder..." thing going on.
Now there's this cute coworker I've had a crush on for probably 3 years... I'm kind of above her on the food chain though so that's frowned upon. Plus I made the mistake of introducing her to her current boyfriend.