Boyfriend PPD?

This is sort of long so thank you in advance if you actually read.

Basically my boyfriend has suffered from depression for a long time. When I got pregnant he really made a conscious effort to try and deal with his problems rather than just “dealing” and basically operating in a state of high functioning depression. Our daughter is 8 weeks old, and once she was born it was as if he took 1000 steps backwards. The straw that really broke the camels back in the situation was He lost his job because the small business he was working for went under. At this point pretty much all he wants to do is sleep and watch tv. He has started seeing a therapist and hopefully that will help.

In the meantime I’m exhausted mentally, physically and emotionally. I went back to work when baby girl was 5 weeks in order to make ends meet for us. With just my income we pretty much scrape by every week while I try to catch up from the few weeks I did take off. He watches her for 5-7 hours a day while I work but I take over as soon as I get home. I take care of everything around the house (cleaning, laundry, dishes, Car maintenance, etc), plus workimg and taking care of our daughter. He occasionally cooks dinner. We don’t really talk and I feel very disconnected from him. I know he is trying to work on his issues but sometimes I find myself feeling really frustrated with doing everything alone while trying to be supportive and lift him up while he’s down. I feel super lonely and like just because I’m managing basically on my own it’s taken for granted. I just feel so tired and like I’m being worn down and drained. I’m honestly not sure what to do for myself in this situation.