I think cutting ties with family is always a sad thing - but sometimes it is for the best. I had to cut ties with a sibling and it was a very hard decision ... but it stopped the abuse. It sounds like you are in a similar place ... take care of yourself. Put yourself first and it is OK if that means needing to separate from family members.

Cutting ties doesn't need to be a dramatic turn of events, IMO. Your family members are so wrapped up in their own issues they may not even notice until they "need" something from you. (Reminds me of my sibling. I simply distanced myself, haven't heard from him in almost a year, and simply don't plan to return his phone call if he gets in touch, etc.)

Best of luck to you - thinking of you, as well.