Best books on loneliness/isolation?

I'm a NEET that lives in a pretty small town. I have few friends, no female companionship, and am quite stricken with anxiety. My life for seemingly forever at this point has been full of isolation and loneliness, feeling utterly disconnected from the world, unable to even find much to do outside, and thus being stuck online, in circles that barely solve any issues, if any at all. I'd like to get some book recommendations based upon that, as I want to read about a lonely character I resonate with. Preferably someone with a sensitive, romantic soul