He has asked to move back in, give up his house he is renting. He has told me that he knows it will be hard, and that feelings are there, he told me that he does love me, just not "in love" with me.
Would you move in with a guy who maybe wanted to date you but wasn't sure if he was attracted to you and wasn't over his ex-girlfriend? NO!
Tell him he has to start at the beginning. He has to ask you out on dates. He has to woo you. MAYBE, if YOUR feelings start to come back, you would CONSIDER him moving back sometime in the future, but NOT NOW.
He's still way too confident that you are there waiting for him, and all he has to do is decide between you and OW. You need to be mysterious, get him to watch the kids while you go away for the weekend to some undisclosed location. It's amazing what a little jealousy will do to snap those "feelings" back into place!