As for your response to her email. I wouldn't have put this in there: "Please understand that I will always be there for you. Thank you for being who you are and sharing that with me. "
The first sentence was fine and sufficient. Its very important that you don't become a doormat. I made similar mistakes i.e. putting her on the pedestal. Women in general don't like that, they also like their men to have confidence. If you act timid or preachy she'll lose interest in you and look for a man that's confident and is sure of himself. That means be cordial, say that you understand her but say things with confidence, say less, become just slightly mysterious i.e. make her wonder what you meant when you said a three word sentence. Don't ask her for her opinion on anything unless kids related. Just do things as if you have to make a decision and she doesn't exist.
Remember, stay confident and last but not least don't share with her how you feel unless she shares with you how she feels. You can tell her once that you care about her and you want her back and you're willing to work on things but don't say it again and again...it has the opposite affect on them.
Me: 32|W: 34|D: 3yo 1st bomb: Feb 2006 (left one day, came back a week later) 2nd bomb: Aug 2006 (moved out, ILYBNILWY) 3rd bomb: Apr 2007 (filed for divorce) 4th bomb: <her finger on the launch button>