My ex still loves me?

All you can do is keep trying, if you don't win her back then you are going to have to let go. Lots of people go through this life lesson and live through it, don't let it rule your life. Rewrite the letter and just ask her to forgive you and that you won't bother her anymore if she doesn‘t want you too but to let you know, tell her it is in her hands, if she does not want you back let her go and move on and remember what you did wrong and don't repeat it. Sorry this seems harsh but life is harsh in many ways and we can not always fix it, it's just the way it is. Good luck and God bless...