I can relate to most of that. I go to a job that's a catalyst for anxiety. I've been living on my own for a while now, but same problem, no interaction with anyone - only my old neighbor where the only interaction is her complaining to me for having the music too loud. One day I feel I have the strength to conquer my fears the next, I feel like just giving up completely.
What alleviates this is having some hobby to focus on or reading an uplifting book. But honestly, don't know what to do myself - this can't continue.