One of the most painful things anyone can go through is family division. Separation from a parent, a child, or sibling. From what I have experienced, many times the division begins with addiction at the core of the problem. A person's behavior is so incomprehensible they either reject us or abuse us so that behavior forces us to remove ourselves from the individual. I learned long ago to value my higher power, God, first, and I'm second, all else is in third place. We must have peace in or lives. That doesn't mean we will have a stress free life; it just means having a calm mind. If an individual wreaks havoc on your emotions- diminishing your quality of life- it is best to eliminate all exposure to that individual.
The scriptures of the Bible tell us to forgive, Buddhism purports compassion [as does the Bible]. When, in your heart you are solid in the knowledge that you have forgiven and you are compassionate but you have emptied your well of giving, it is time to be compassionate and forgive yourself. Simply, you have reached the place where ties must be severed; your overall health, your well-being is at stake. It is time to embrace yourself, recapture your peace and then rest in the fact that as an individual you have given all you can possibly give; and God understands and philosophy supports you; because you have compassion for their plight but can no longer be part of it.
40 minutes ago