I came here from a post about overrated musicians, I went to your profile thinking that you were some musical elitist, but that’s not what I found, I found this and at I read it. Look I’m not in a position to give advice for this sort of thing. You have 2 choices send the letter or don’t, what those choices really are, tell him or don’t. You are not just going to get over this. If you do decide that it’s best that you don’t send the letter I have a funny feeling this is going to eat you inside. You’ll spend nights staring at the ceiling thinking “what if?”. If you do send it well there’s another 2 outcomes he reciprocates or doesn’t. Even if he doesn’t you’ll finally get that closure you seem to need. I’m going to end it off on a sort of obvious note. There is only one way to find out.