Pale, stand back & protect yourself first. I'm not saying don't support, that would be awful, but some people just suck & suck & suck until there's nothing left of who you were.
This can be true of non-jw's, but IMHO jw's are masters at it because their scope for self-improvement lies in a very narrow frame-work. Plus many have closed minds to wordly self-improvement. Many of us are people pleasers and push aside self-preservation to ease anothers suffering. Then we realise to our detriment we're in over our heads.
The fact that you have a Gf & didn't drop her with suggestions to get back with your ex speaks volumes.
Tread carefully & take care of yourself.