You are allowed to terminate your relationship with toxic family members. You are allowed to walk away from people who hurt you. You are allowed to be angry & selfish & unforgiving & don't owe anyone an explanation for taking care of you.
Takers will use you for whatever you will give and when a better opportunity or piece of advice comes along, they will bail on you without any gratitude and go in their new direction to take from someone else. The thing to keep in mind is that takers.