When you are friends with someone and they abuse that then sometimes you have to step away. I was friends with someone who constantly made promises they couldn't keep, only spoke to me when nobody betterr was around, often rude and never if ever considered my feelings. It doesn't make me a bad person or 'my issue' to walk away from that.
Sometimes no matter how much you care and how much it hurts, you have to back off for your own sanity.