I'm at my wits end

I'm so freaking tired of this. My hips are messed up to the point that I can barely move, I'm in so much pain from literally feeling the bones rubbing together that I could cry. I took care of the baby all day yesterday while I let my SO sleep because he didn't feel good. Even though he promised I'd get time to rest. Never happened. I passed out with the baby while he was hanging out with the neighbor upstairs. The night before he stayed at his moms for a barbecue after work since he was in the area and his step dads brother who lives there did an oil change on our car. I got to stay home, take care of the baby, and eat dinner by myself waiting till 9pm for him to come home. 

And today, I just called to see how fixing other parts on the car was going and how much later he'd be since he got off work 4 fucking hours ago. And his response? "I'll call you back, I'm with a friend I haven't seen in a while."

Excuse me. What the ever living fuck. This is exactly why I tell him he acts like his friends are more important than us.