Thank you all for your feedback. Feel free to share more. Otherwise I'll be drafting a reply and posting it for review. So far the highlights:

-validate the feelings she did share
-answer that I'm not in a committed relationship
-keep it to one paragraph
-offer to listen if there's anything she'd like to share

Again, thank you!

Me:38 XW:38
T:11 years M:8 years
Kids: S14, D11, D7
BD/Move out day: 6/17/14, D final Dec 15