Books against attachment

Hello everyone!
I suffer from emotional attachment. I'm in a totally contraindicated relationship and, still, I can't get out of it. I'm reading Detaching Without Anesthesia and it's helping me a lot, but the time is approaching to physically separate from her and the place where I live and I want to remain firm so as not to make the mistake of returning because I miss this place or the good times. Any book or guide to help me with this? Thank you!