Hi Lemon,
I can certainly relate to your problem. It's the old adage that old habits die hard sometimes.
It's really hard to step back from someone when for years you were their caretaker for the most part. Hearing the same kind of issues even months or sometimes years after a break up can bring us right back to the place we were way back then.
The good thing now is that even though you may be feeling the anxiety and that pit in your stomach and the urge to step in and fix things, you can now sit back and play the healthy supportive role instead of jumping right in.
It took a long time for me to be able to back away from my ex when I heard of his problems. But in time, I finally succeeded in doing so and it was soooooo freeing to me. And I've found that nothing has changed, regardless of whether I would step in and try to rescue or do absolutely nothing at all. He makes his own paths. It's not my responsibility to rescue him. Now our responsibility is to ourselves and our lives and how best to live them on our own.
I wish you well!

sabby