Stupid thing to ask but need advice?

Okay last two questions where about my ex but I need advice now. Back about seven years ago I dated this lovely woman and we did what we could. I tried to do everything. I drove her anywhere. She didn't drive and yeah I had asked her for gas money. People still think that was a bad idea. Anyhow she failed out of college. I tried to keep going to get my as (my degree). I kept trying to better myself and she wanted something else. before long I got the idea to ask her for her hand on or 3rd annverisy. Well she dropped a bomb shell on me. She had been cheating on me for two months with someone she "met at work". Well I didn't know in fact our last date she told me her fathers rule was " He can't spend any money on himself it has to be all on you". Well needless to say I tried to make that work and I had even planned out a second date. Lets just say the second date never happened.

Well she then left me over msn messager. dropped the bomb before as I stated and I was like ok truth time. I 1st asked her why she dated me. Her reason was out of pity. I asked her if I meant anything to her. She told me I was a loser. Well later I asked her if we could at least be friends. Stupid idea that was since later she posted on her facebook living with my boyfriend. That wasn't what hurt me the post after her friend hurt me wrose. It was "did he ask you the big question" and she was like " I am hoping he will. I never got that kind of praise from her.

Well it was 5 years later and she had almost left her husband. He ended up punching her in the face and beating her within an inch of her life it sounded like. She then went to find me at my work. I pretty much had forgotten all about her I thought. She had a little surpise and was hoping that I would take her back with a major catch. During the time she was away she had a baby and was hoping since everything in her marriage had fell apart that I would save it and go back to doing almost everything again. I told her off big time cause I can't deal with it.

She didn't understand and at 1st made it wrose and I almost had to call the cops on it.

So did I do the right thing?