Amy love, I was where you are 5 weeks ago (wow, 5 weeks, is that all? It feels like a lifetime).
The shit that has come out since he has gone is mind boggling! His deception and lies extend so much further than I could ever have imagined.
I discovered he had joined an online dating agency. I've since discovered he has been having an affair with a married woman at work whose husband has walked out on her and he is on the verge of being in serious trouble at work.
The important thing i want you to take from this is that I could have believed him a hundred times over, I wanted to believe him! He's made it all into me, he's painting me out to be an emotionally abusive partner, he's rewritten our entire relationship to suit his own ends. He's been insulted, denied, looked me in the eye and made promises and every single thing I've suspected/discovered/queried has turned out to be true.
he's really struggling at the moment. he's alienated his family, his friends and work are none too pleased with his conduct there. The children don't want to know.
Me? Well I'm skint, but I'm happy 
Or at least, I'm not as unhappy as him! He might have found a new person to be "nice and kind" to him, but he's fast learning that he doesn't live in a disney film, he lives in the real world and the real world expects better of him.