AF, I'm sorry you are feeling sad about this. Don't NOT post about family issues. Sometimes we all need to vent. You've got your family. I have husband issues. Sometimes I sound like a broken record. I fully expect people to say "well DO something about it, already". And I am. Slowly but surely. And venting/talking about it helps me process that.
You are letting go of someone and something in your life. It is hard. You may be sad and miserable in doing so. But you also know that it is causing you pain if the situation stays the same. You're conflicted about that. I understand that you are sad that it is what it is. Don't drink. You will find your path. Keep looking for it.