checking out with DH

Just needed to vent. I'm so ready to be done. I've been a "single" parent for months while he decided the bar and his friends were more important. He said he had to get everything out while he can before our baby got here, even though we have a 2 year old at home too. It's every weekend, plus some. He works M-F do weekends are really the only time we have do to things as a family, but he spends the majority of the bed in bed hung over. well, baby was born last Friday, he was at the bar while I was in the hospital and his mom watched our 2 year old. He said he had to because our sweet dog passed away just an hour before baby was born. Now it's the weekend after, he just came home at 5 am (bar close is 2:30.) I told him yesterday when he walked in from work and the first words he said was "can't wait to get drunk tonight." That it was his family or the bar, well, I guess he picked the bar. I'm hurt because our 2 year old really needs him right now. He's not adjusting well to the baby, and I can't do much with him as I had a c section and trying to figure out how to give him the time he needs while caring for a newborn. I'm just so frustrated and can't help but think we'd be better off without him.