Ending a realtionship when there is a baby invloved

To make a long story short, I have been in this relationship for 3 years now, and recently had a baby two months ago. I am very unhappy and want to leave but not sure how to do so, and if I should considering my baby girl. He has porn addition, and lies about watching it,right to my face and would rather watch porn then come to bed with me, and the odd case if he does come to bed with me, the sex has gotten for abusive of. When i confront him on watching porn his response is..well would you rather me cheat? ...ugh ... Secondly, he also has a gambling problem and has spend hundreds of dollars on playing on line poker and can afford to things that we need, so i am left picking up the bill for everything and the stress is starting to take its toll. He recently stopped playing poker for real money and now spends his time playing free games in hopes of winning money. He does not have a good paying job, and wont look for one that can support his family, he would rather just stay with his low paying job. Im tired of feeling like he is just hanging around for a free ride.
He calls me names and says very hurtful things to me when he is angry. I want to leave but he threatens to hurt him self. I do not loving him anymore, but I care about him enough that I don't want to leave because I am worried about what he will do.
Please help with any advice you can give, I don't want my daughter to grow up and think that this is how a relationship is, and i dont want to spend anymore time wasting my life, giving him chance after chance to change only for it to blow up in my face.

HELP.