You are compassionate and empathetic. You should have a friend that is willing to give as much as you do. I know how it feels when relationships are one way. Everyone has relational and family issues if they are honest. I don't think all of their lives could be a good as she says. I think you would feel so much better the more distance and disconnect you have with her. It seems her behaviors are passive aggressive, to devalue (criticize) you and try to feel better about herself.