Sorry to hear that you are so lonely, I can sympathize with your situation, my depression got worse on the SSRI I tried. I have atypical depression, I can get happy if the circumstances provide for it, I also have PTSD as well. But unfortunately my life is mess, I also have no job and am seeking employment. When I was in better health I would go for walks around the neighborhood because I was so stressed.

I do think group therapy would help, I feel isolated and lonely all the time as well. At least you have a relationship going for you. Cherish it because having emotional support is crucial for recovery. Seems like the only time I feel like I'm with my people is with other people who suffer from mental issues. My only friend that I keep in touch with also suffers from depression and anxiety. Hope things turn around for the both of us, being broke on top of depression is like being kicked while you are on the ground.