I understand your pain. I've been running up against a similar situation myself. I'm sorry you feel so lost and overwhelmed right now. Please know, that what you are doing by taking your ex back into the house to keep her from being homeless is a wonderfully selfless act. You are doing this for your D, you really couldn't do anything else, could you? Your D would be devastated and would have an impossible time dealing with her mother not being taken care of, especially by you. Kids tend to internalize the circumstances of their parents and apply them to themselves, so if you didn't take her mom in when she was in need, she may look at it like you wouldn't take care of her when she was in need either.
Now, stop the wishing your life were over crap. You know those thoughts don't do you a bit of good and will only drag you further into the dark.
Do you pray? If not, why not? The comfort you may derive from the practice could be worth it.
Best wishes to you.
T19 M15 S19 XH47 M43 bomb12/4/07 PA5/07 S12/26/07 D final 11/17/08 Back together with no defined R 05/2010 confused....to say the least!!!