Books to learn how to live with yourself

Hello everyone , I have been struggling recently and had a hard breakup in my last relationship and it made me realise certain things about myself so I want book recommendations that could help me to live alone with myself , to be good for myself , feeling enough for myself while moving on from a break up , I’m struggling with building a life that is good for me while being alone and not depending on a relationship , I want to be able to focus on myself and improving who I am and getting better