Maybe you're still suffering depression because it sounds like you're still overthinking (I know it's hard not to) but also maybe he's struggling with something similar. He had to pick up everything when you struggled, maybe that's affected him.

I understand you had an actual medical issue going on with the depression but your framing is very unfair. A loving partner can still be massively hurt or shattered by your actions and words. But I still think you may be dealing with depression, it doesn’t sound like you’re 100% okay with how you word and catastrophize things

I’m not excusing him because I don’t know him but maybe him being close and then distant is him battling his love for who he knows you are and his hurt/trauma from the woman you’ve been to him lately depression or not

My depression started because we agreed no visitors, he then had people over constantly when I was recovering, he would lie to me about dumb stuff, play video games up until 2am instead of help me with the baby, I was super alone, so I’d get upset and argue with him because I needed his help, he wouldn’t like it when my family would come over so again I was so isolated as a new mother, but I do understand where you’re coming from

He didn’t pick anything up:( I’ve been picking all the pieces up, I’ve had no support from him at all just constantly being dangled on a string, one minute he wants me the next he doesn’t

Assuming that’s all 100% true, unbiased and fair then that’s a different story

I pretty much have been blaming myself for everything so I’ve not been adding his faults so much because I do blame myself (I think it’s part of the depression) even if he had cut me with a blade I’d think it was all my fault:/ I can’t help it

So maybe you're not meant to be together. Reading your other comment any father who stays up till early hours playing games isn't responsible or helpful

Then you should separate, seek therapy if you’re not already and get healthy for you and your baby. Wish you the best .