Please help me get leave him

[Lovinthelife]

My partner of 6 years joined FB dating a couple of months ago. I discovered this going through his phone (previous mistrust). He never got further on the site than a few messages. It's since been a long hard battle for me mentally with loads of heavy arguments. Then earlier today I saw in June this year he friend requested three attractive young girls on FB. None accepted and he 'has no idea how this happened '.
He's lying isn't he?
I've told him to remove Facebook altogether but he won't.
It's over isn't it?

Sorry title was supposed to be 'get rid of him' not 'get leave'

It’s over because you don’t trust him, you don’t need evidence.

Yes, it’s done. Throw him back. If you have kids or going finances/mortgage/lease then it’s a bit more complicated, but that doesn’t mean it shouldn’t be done.