postpartum depression

I just had a baby about 9 days ago. I've been suffering from postpartum depression  for a couple days and I'm taking meds for it now.. I'm only 18 and my boyfriend is being the worst person about this. I tried to explain how upset and sad I am balling and he thinks it has everything to do with him (which he's always been our whole relationship) he didn't say anything he left my house and didn't say anything at all. I texted him and asked why he left when I was this upset and he says that I always do this and if I'm not happy to break up with him. But it had nothing to do with him I was not happy because of everything. I tried to explain im extremely stressed and he cannot understand until he goes through something like this. I told him all I need is a friend, someone to listen and comfort me. And he just leaves. I finally told him I just want to be friends, and that I want him to be happy, and hopefully one day we can work this out but I just can't do it anymore. He's been like this from the time we started dating but of course he treated me awesome when we first met. I don't want to take him back and I know I shouldn't cause I'll just keep getting blamed for everything even stuff I can't control. I just needed to vent and to be told I'm not over reacting