So lonely

I know I have Postpartum Depression and I have gotten help but it is not working. My type of depression is where I feel incredibly lonely and angry and hopeless. I'm a stay at home mom who takes care of the baby day/night. My boyfriend would rather play games on his computer rather than help me. And when I ask for help, he takes the baby and calms him down and sets him down to sleep. And when the baby wakes up, he pretty much ignores him so then I have to jump in. I'm exhausted but I cannot sleep. I get maybe a couple of hours in a 24 hour period. I don't know what to do. I just want to escape and leave this life behind. I'm so hopeless.