I think he is giving you pretty clear signals he is not wanting anything more than a good parenting R with you.
You need to walk away and not pursue. No calling, no expectations, work on yourself, be a good mom, etc.
If you are hanging around and he isn't interested, who is going to be at fault here?
I think from what you posted it is pretty clear he has someone else. Mad testing is a huge indicator. Do you want to be someone's sloppy seconds? Have more integrity and move on. It will increase his respect, and possibly get him intrigued. But you must have SOMETHING on the ball to keep the intrigue--or he'll just see it's nothing and move on.
Right now it is only your S that keeps him around. This MAY work for you--because if you do this well, you can get him curious about you. But it does need to be built on real changes--they smell fake a mile away.
Lots of real, positive changes made FOR YOU. Don't invite him to anything--go dark (or dim with kids) on him until you have plenty of "new things" in your life.
