What are your first principles (rules you've developed) in your life?
People who make me feel like crap or worse off then when I encountered them consistently are written off and out of my life
Doesn't matter if its family, nobody is entitled to your attention and suffering and it does nobody any real good for you to succumb to the inevitable dysfunction it creates in your life and relationships and also material conditions.
You can't fully trust anyone, not your parents, siblings, extended family, spouse, best friend forever, no one. Don't count on anyone for anything and accept that the only person in your life who has your best interests at heart is you.