Most Helpful Guy
He just wants something he now can't have. If you don't want him back in your life at all, block him on all your social media. Stick with the guy you've got now! Your ex doesn't deserve to even try to get you back!!
Most Helpful Girl
He hates knowing you moved on and he didn't (whether it's by choice or not).
If I were you I'd continue to not speak with him.
Just think of it this way, if your relationship status never changed he wouldn't have saw any importance in trying to contact you.
He just wants control over your situation and the power to mess things up for you.
Don't give him that.
Continue on with your life and enjoy this new guy.