let him go. sounds like he's moved on and you should too. don't try to seek some sort of satisfaction by having him lie to you. you know he will. it's childish. next drama scene.
You should get revenge sex ASAP
Today would be a good day for it.
He's your ex now, what's the difference?
If you love something set it free - if it comes back, it is yours; if it does not return, it never was yours.
You know; you now have found freedom - no longer a prisoner of false love.
Excellent...you will be so much happier! Xxoo