Yes, I have to look out for myself, but it's so hard!
Thank you for writing so honestly. I agree this is hard -- very hard. It seems there are two basic camps here, with lots of shared pain -- those abandoned with no contact, and those with contact but deep reservations about continued contact.
You are not alone.
If I could pick one thing I've read most often here, it is:
Surviving a Breakup with Someone Suffering with Borderline Personality Disorder - 10 Beliefs That Can Get You StuckI use it constantly to give myself a reality test.
There are no "right" answers, and all paths are very hard. Space -- however achieved -- gives us a perspective that allows us to make choices, rather than react emotionally (which I did for a long time).