Books for someone that has given up but doesn’t necessarily want to get better

I pretty much resigned to not succeeding in the traditional areas of obtaining happiness. I have a tolerable job, affordable appartment and two lovely cats, but I hold no hope for finding love, companionship or even enduring friendships.

I currently have no desire to really enter the world anymore. Many books have protagonists with desires that they are actively chasing. I really want to read something different than that, could be about someone in a similar position to me but doesn't have to be.

I don't want something sappy that is supposed to make me feel better. Could be gruesome horror or something abstract or whatever.