my leo is confusing the hell out of me... help!

we were arguing alot since May (my father died and I went into a depression) And he dumped me in August after a 4 year relationship. No later then 5 minutes after he dumped me he changed our relationship status on Facebook and took me off his friends list and even treated me like crap for 2 weeks. He tried to move out but I told him to stay until after the holidays for the sake of our kids they're already going threw it with out their grandpa around so he agreed. The plan was for him to find a second job to help support himself so he could move out on his own and we would continue to coparent.

I found out after we broke up a few weeks prior to the break up he had been flirting with some catfish he met on xbox live and she sent him nudes (she's in Vegas we're in philly). He says he didn't have any interest in her and he sent her pics to friends (which is how I found out). And he knew we were gonna break up any way hes known for almost 2 years but felt strongly about it around the time this girl popped up. that's when my leo started giving me less attention and I did dome digging and found out about him and her.

So tried to kick him out that night he begged me to stay and I let him. But he kept in contact with this chick for 3 weeks after and hid it until I found out. I tried to kick him out again he begged to stay again and told me nothing was going on. it wasn't until the next night I told him something that made him drop her completely (yeah I tracked her down and found out who the little catfish really was). Anyway that's a little background to what's going now here's where I'm confused:

There was a 2 week window where he tried to be cold to me when he dumped me. But He Would Catch Himself Smiling At Me Or Laughing And Would stop and try to act cold again. He put up dating profiles on sites and was talking to a bunch of chicks... After the second week it slowed down and by the 4 week he was sleeping in the bed with me again, we're having sex, he says he loves me and acts like nothing happened. Like we're still together. Still cooks for me, wants to cuddle and kiss on me. He even stopped talking about moving out. He says he wants to be here with me and the kids because he's happy here with us. He still calls me the love of his life and says if he marrys anyone it's going to be me and no one else. But when I say let's get back together he says "not right now" wtf?! Can some one explain to me what going on here?!

I'm sorry I mentioned we were together for 5 years. And he claims that during our relationship with all the love and praising and stuff iv done for him that I made him feel like he wasn't good enough for me because I would drop hints about us going on dates when he was broken but I was the one who wanted to pay for the dates and just wanted to get out of the house with him!!! But he didn't want to because he was broke. It's OK for me to pay for all the bills and for your clothes and games but not for a date? He has to pay for it or we wouldn't go.