Struggling to Connect with Others: Is it Depression, Autism, or Burnout?

I can’t tell what is causing my inability to feel connected to others; is it depression coming back? Or is it just my autistic brain preferring to be alone and doing the same things over and over for comfort? My ADHD brain driven by interest/having a hyperfixations that doesn’t involve people? Or is it burnout and exhaustion? A mixture of a lot of things? Whatever it is, I’d love to be able to figure out what makes it so hard for me to focus on others. I guess other people just like, start talking with people and asking about how they’re doing? Make plans? While I feel like all I can think about most of the time is taking care of myself and mitigating my health issues. It’s just not realistic to me to know how to be a regular person in that way. No one ever really taught me. I feel so trapped and overwhelmed by my conditions sometimes.