OH, what a great night--I can see why it would encourage you. Please be cautious however. You're right, one night doesn't cure what ails you. You have to take it really slow. She still needs time. The things in the letter are really good, but you should keep it for you right now. There are some things in there that point out to her what you think she "should" do and what you "should" do together. Remember, that kind of stuff is all about you and there's nothing wrong with it, but if you share it with her she is going to see every negative she can find in it, and she will. Actions speak louder than words. Don't tell her what changes you want to make or will make, just do it. She has to see and feel it. I know you want to tell her--I wanted so much to keep telling my H what I was going to do and how I was going to be different, but none of it stuck until I actually did it. So keep your letter to remind you of what you will do to make things better. Great goals in the letter already.
Keep up those nice dates--don't push. Be respectful and keep letting her decide what happens as far as physical touch. My H doesn't kiss either, he never has much. Just the pecks when we are separating for the day. He actually thinks it is gross like sharing a toothbrush. He won't let me drink off his straw or water bottle either. Weird!!! It is disappointing to me cuz I like kissing, but I have to respect his feelings about it. I can't make him like it.
Anyway I hope I'm making sense. I really don't think the letter is a good idea. Most DBers will tell you that too. We've all wanted to do it at some point, but we realize it is for ourselves, not for them. It is to make us feel better and maybe get them to have a miraculous change of heart over night. It doesn't work that way. It will take time. My and H and I were separated for a year. It took me many months to make my changes and I still have to work on it everyday.