I want to help facilitate a great relationship with you and the girls and I also am looking forward to seeing what my future holds . To me, that means no looking back, no regrets. In order for this to be a healty, happy and exciting transition for me and the girls, I dont want any false hope or for it to look and feel like our marraige and family once did. If I hear of anything the kids would like to do, I can happily give you suggestions.
I agree with bug and TS, it's too wordy and it's also vague. You're missing the part about where you don't want him spending the night Maybe "I've thought about it and I don't think it would be a good idea for you to spend the night here." If he asks why just tell him "you and I both need time and space to sort through our thoughts and determine what our futures are". What this does is injects a little mystery into it. He'll start to wonder why YOU need to sort through your thoughts (when up to this point it's all been about HIM), are you slipping away? Could he lose you? Plus you're setting a new boundary when he is anticipating that he can make all the rules and you'll happily accept them. Good DB'ing all around.