Comment by banterfoil

There is already a ton of good advice on this thread, so I will try to avoid sounding like a broken record. But something that really stood out to me is you not leaving your flat. I think by just staying in your apartment during all your free time is really hurting you. I found that even if I take a 15 to 20 minute walk outside, I will usually feel happier and refreshed. Give it a try! Good luck!