You said a lot of good things in that letter. Here's the trick....
You need to show him, not tell him! Every time you see him, talk to him, text him, email him. Every time you see someone he talks to, or his family. You can't tell him about the changes you are making, you have to live them. And live them for you, not because you are trying to show him.
You don't tell him you are not going to be needy and clingy, you show him, by not beeing needy and clingy!
Don't tell him you are learning to be happy. Be happy!
Don't tell him you are working to get well. Keep up the work. (And I can already see that you are doing it. Don't let that stop!) He will see it.
It's going to be hard. Since you don't see him or talk to him a lot, every time you do is important. Keep growing. Keep healing. Keep becoming a complete person. And, you said it... love yourself!
Let your anger motivate you, and give you strength! But focus on you, and not him. You are the one that you can change!
