Alternate advice:::: go into it with NO expectations from him.... Expect nothing from him... Here's why....You send your letter... He's moved on (let's say)... takes your letter and tosses it in the garbage. I think you need to make sure your intentions are pure from expectations. You write your letter, send it, you've done all you can. The end!

If he writes back great, and if not... there were no expectations from him so you won't have set urself up for heartache.

I think, the question you need to ask yourself is this... Can you write a letter, send it and be ok without getting a response or getting the response you'd like??? If you can send it... If you can't don't..