Suggest books similar to Metamorphosis

I have read Metamorphosis by Kafka which was my first read of Kafka. I liked the theme of being uselessness, losing his sense of identity, self worth and how his family treats him.
I want to read similar kind of books revolving around the theme of : wothiness of love, self-worth, conditional love, human neediness to be loved, as such that will make me think for days.