Should i stay with my boyfriend and be suportive or should i say good by?

ok to make a long story short i have been on and off with my boyfriend for ever.we just resently had a baby girl she is 2 months. see he hasnt had the grates life, he has been in and out of prison his whole life, one time i wasnt faithful and thank god he took me back. but this time when he got out of prison he wanted to stay clean but that failed, know hes on the run,and its like hes pushing me and his dauthger away. i want him to be in her life cause i gruw up with out a father and so did he. i mean i know iv hurt him in the past and i regret it , i want to help him get his life back on track cause every one olways gives up on him and i dont want to give up like that. but it seams like he dont want my help he does but he fights it cause hes on drugs. i love him so much he was my first for every thing and i want to help him. but the pain it takes to do it. should i stay and help him so mabe our baby girl will now her father or should i say good by figuer it out on your own?