<human>: Can you summarize the given text in a few sentences?

Short back story. Ex and I dated for for over 3 years. We had a child together and recently she left me. I have custody of our daughter. 

I still love her very much and we have stayed close when she was more or less homeless after our break up I asked her to stay her and we could be room mates. It has been hard but it has worked, okish.

This has let me see things with her current relationship, frankly it is going south fast. She is hard to be with at times and he is doing everything to push her buttons and not realizing it. I can see it and know where it is going, and he has already said at least once that he thinks they should step back. I am in a position to either do nothing or push just the right way and make sure it burns.

I honestly think it will end sooner or later, but sooner is what I want. I can start the process to mend our issues and be happy together. 

I just don't know if I should
<bot>: The woman I love left me for someone else, her new relationship is falling apart and I don't know if I should help it fall.