I can relate my mother is the same way with me.. Sounds as if you need to walk away. Yes she is your mother but by the sounds of things she dosent act as one to you. Try and slowly detach yourself from her easier said than done I know. But you don't deserve to be torn apart by the one person who is suppose to love you unconditionally. Your mother had issues that she needs to deal with sounds like before your relationship could ever change. If she is not willing to take on any responsibility you can't make the relationship better. Distance yourself build up or own self esteem. That's the only advice I have for you.