Confused -
You might want to get that letter back from his parents. It might have made you feel better to get your feelings out but telling him your feelings and how much he hurt you isn't going to do any good. First of all, that letter might just add to his guilt and all that will do is make him angrier - at himself and at you. Second, he must already know how you feel and repeating it isn't going to change anything.
That is the hardest thing to learn - you can't change him. You can only change yourself and how you deal with life. It is a very difficult lesson to learn. Take this time to sit back and take a deep breath. Think about what you want your life to be like - either with him or without him. Go to an Alanon meeting like you talked about. Do anything that will take your mind off of him and that will give you some pleasure and relief.
Hugs, Jo