I realize I am late to the game, but I just read the letter and have one comment. Why do you close with "I love you"?
To me, that negates the entire letter. It says, "well, you don't try and I'm not happy with this life, but I am a whipped dog that loves the master that treats it ill, so you don't have to change." Unless you sign all correspondence "I love you." I would take that out. Just sign your name.