You're not obligated to maintain a relationship with anyone who treats you poorly.
No mentor, friend, or relative deserves unconditional loyalty. Past help is not an excuse for present harm.
If they're having a negative impact on you, you don’t have to keep them in your life.
You don’t need another human being to make your life complete, but let’s be honest. Having your wounds kissed by someone who doesn’t see them as disasters in your soul but cracks to put their love into is the most calming thing in this world.