Is he serious about me?

My ex husband and I were on a verge of divorce. We were waiting to get divorced, so I guess we weren't yet divorced, I met someone while I was still married to my ex. At the same time, I was still communicating with my ex due to our children.

My ex didn't want the divorce, he always ask me to go back to him. But the new man always convince me not to go back. He promise me he will treat me better and love me like no other. But he won't make us official until the divorce is finalized.

Months passed, the divorce was finalized, months after the divorce, he still hasn't made us official. I did, but not him. When ppl ask him, he said he's single, but talking to a girl.

My family wants to meet him, but he refuse to meet them. He doesn't ever go to his family events after I came in his life. He cut off his mom cause she doesn't want him dating a divorce woman with kids.

I would post pics of us or post on his timeline, but he would delete it immediately. Or tell me not to do it. I ask him why, and he hesitated saying that he doesn't like ppl posting on his Facebook.

What do you think?