Why would your mother say your extended family isn't yours?
Were you adopted? I am sorry your mother says hurtful things to you.
How old is your Mom? Does she realize how hurtful and damaging her words are?

Do you have someone to talk to? How is your relationship with your father?

This may not help you feel better but you are not alone.
People here at pc have been through a lot and are kind.
The more you share you will find friends that are dealing with the same issues.
Your Love and loyalty to your parents speaks highly to your character.
You are not a failure.
Emotional energy has to be fed, if not it gets depleted. You need to replenish
your spirit and exhale painful memories.
I hope you find what you are looking for, I am Happiedasiy