My self worth and sense of dignity since my breakup are at an all time low. Does anyone have suggestions for books to offer a sense of perspective moving forward?

Something that will maybe make me hate myself less. I have mortified the hell out of myself chasing after a guy and feel totally worthless. No wonder he doesn’t want me anymore, who wants someone who basically begs for them, acts pathetically desperate. Who asks cringy questions like “Do you still have feelings for me?” He’s (38M) so much cooler than I (29F) am and wants someone who’s confident, not this insecure pathetic loser who needs constant reassurance. I’m no loss.

I like Kurt Vonnegut if that helps.

Thanks in advance