After everything I have supported him through he is the one who doesn't want me! I totally get why you feel like this, it's just so unjust! However, one day you will realise he has done you a massive favour and whichever way it came about, he has given you your freedom - take it and run!
My EA ex met someone, moved in, seemed to have a nice life with her and our DCs when they visited once a week. Turned out she wasn't very supportive of him when he was struggling with depression - karma bitch!
To be fair, we get on ok now and spend time with the DCs all together sometimes. I have a great life - attentive loving partner, bit of time off when the kids are with dad, bit of time to myself. Best thing that ever happened to me, even though my world imploded when it actually happened.
Keep in mind the things which you now know were EA - if you have any threads on here I suggest rereading them as you might have forgotten how bad things were. You are still coming to terms with losing the control over this situation, so be gentle on yourself and look to the future, imagine what your life looks like in a year or two. Then do everything you can to make that a reality.