I need quotes or sayings about missing/losing something that was so small.

The story is that I had a thing with this guy (we liked each other but we never went out). it went on for a few week. but we never did anything (never kissed, never held hands, nothing really). so we started to grow apart and we finally ended it. when we talked, it felt so nice. we had so much in common and I wish I just made my move and none of this would've happened. I miss him a lot and recently I've been rebounding on other guys, and I think he found out. I feel really bad and I regret everything that I did. I don't want him to think I'm over him.

if you could post a short quote or saying about what I mentioned earlier or about rebound love or regrets, that would be great. thanks!