You are allowed to leave relationships. You are allowed to leave a relationship with any person, mother, father, sibling, child, boss, friend or romantic partner who is manipulating and abusing you. You have the right to protect yourself and remove these people from your life.
Life is miserable when you live in perpetual states of confusion, fear and trying surviving on relentless hope. This is not love. Whoever is making you feel these ways is not loving you.
If anyone tells you that you should not cut ties with family because “life is short,” you must hold the mindset that the exact reason you did cut ties is because your life is absolutely too short to allow yourself to be continually abused by your family or any other toxic relationship in your life. You have a much better life to live.