Tamantha, do what I did, read over your posts and you will see that you are doing the right thing, when you see what you have written it gives it a different perspective. I know it is so difficult to have to make decisions like this, without the emotional support you need, but you were strong enough to make the initial move, and from your posts I think you will be strong enough to follow thru' with it. You are not to blame for what he is doing, it sounds like something he has struggled with his entire life, and you have tried, and given him so many chances, what more can you do, now is the time for tough love. He should appreciate the fact that you love him enough to try and help him, if you did not, you would have walked away the first time.
How do your daughters feel about everything?