Does he want her back?

Ok so I am in a relationship with this guy who has a 4 year old daughter and her mother is his ex fiance.We got together under odd circumstances i was in a relationship but he was away (marine) at bootcamp and i fell in love with this new guy who wasnt even my type at all.Well the day i decided to break it off with the Marine for my current bf i told him id like to stay friends with my ex he was fine with it but after awhile he complained so i changed my number and cut my ex out of my life.Well I thought it was only fair that he should do the same with his ex ( of course i understand there is times they need to talk regarding there daughter) He bitched and moaned then agreed .Well recently i found out they have been having hour long talks late at nite while i am away at my moms or friends.I asked him about it and he said she wants him back but he doesnt want her back.Well i checked his phone records and she never calls him he calls her.I got ahold of her and ask her what they had been talking about she said he had been complaining about us and asking alot about how her and her current bf were doing i of course confronted him on all this and he got really quiet oh and when i told him she said she didnt want him back he seemed kinda depressed and upset.I am so upset about all of this they were together for 5 years he has cheated on me with her once that i know of.He says he will not ever do it again but admitted that when we broke up (for only 12 hours) he had went to her house and wanted to sleep with her but did not.What i am wanting to know is if i should still be with him and it is normal for him to act this way if he doesnt want her back.Also when we first got together he talked of how he wanted more children and a wife but tells me that he doesnt know if he would ever want to marry me. He also says he would never have a child with me because we do not agree on how to raise a child.But then he always listens to my advice on what to do with his own kid i dont understand that at all. Please somebody let me know if the way he is acting is ok i mean he says he loves me so much more than he ever did her but he wanted to marry her and planned the child they had together,but wants none of that with me and gets upset when i mention it.I am not saying i want to get married and have kids now but he makes it well known he NEVER wants that with me.Sorry so long but im very distressed over all of this.