how can I love someone like this

how can I love someone who treats me like shit and I get afraid to be alone ! my husband chose his friends over his own family. friends that influence him to go buy drugs. My husband picked up a drinking habit everyday drinks 3-4 coronas or he's drinking jack Daniels or vodka ! we have a baby on the way I'm due in 2 months! I told him about counseling he tells me no because it won't work yet I keep staying. I grew this attachment to him because i have nobody I lost my mom to cancer found out I was adopted before she passed have no family and he was there for me when she passed. we also have a 4 yr old together:,( just got off the phone with him and he told me I'm a baby he's a grown man and will make his own decisions. this is completely out of no where he also told me when he texts his friends he deletes all the messages because he talks to them behind my back. His friend is dating a girl who was obsessed with him and threatened me so many times. it's so fucking hard to let go when you have nobody and have ssi money but isn't enough to move. I printed out divorce papers and filled some out. And every time he tells me he's breaking up with me he tells me he's not moving out. I'm pregnant and so damn stressed !!!!!!! all I can do is cry. The man of my dreams turned out to be a huge waste 6 years down the drain :,(