It’s good that you know you need nature and interactions with people. I’ve had major depression for 15+ years and take my meds which help. I find that I withdraw from everything sometimes which is worse thing one can do. I’ve used SAD lights in middle of winter and belong to gym to socialize and do yoga. I’m also very much alone and that feeling can make it worse. Have you tried taking up something new....like meditation, yoga, music is great to listen to or play instrument. I’m trying to learn piano which helped me over this COVID year. Had a circle of friends that I walked with this winter and spring which I think saved me. Thankfully, this winter wasn’t a bad one and got out most days.