Yes, he'd remember. Kudos to him for letting it go now that you've matured and have become nice.
If you felt the need to apologise for your behaviour back then, it wouldn't be a bad thing.
Oh, and if you were to tell him that you were mean because you had a crush and didn't know how to behave, it may open the door to him having further interest in you. (Assuming this is why you were mean)
Last edited by basilandthyme; 19-09-13 at 03:45 PM.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.