In answer to the thread title...
Ummm, no. Not like that.
I think in terms more like researching a new interest, being "obsessed" with reading everything, or "obsessed" about a hobby and running out and getting all the equipment.

I totally agree with you that you need to get away. Waaaaay too much drama there. I don't have good ideas right off the top, but... what about talking to a therapist? They might have some ideas. Ways to disconnect yourself from an unhealthy situation, ways to step back emotionally, figure out the dynamic and why you keep getting drawn back into it etc. Lots of stuff. If this has been going on for 2 years, it probably won't just go away without some professional help. Sure better than dead or jail! Because you're right. It's not heading anywhere good.