I want to point out that Spanakopita's description above adds important context.
You're so locked into the cycle that you can't step back and see how miserable it all is. Or you don't let yourself see it, for the sake of your sanity. And when you've finally escaped, you can really see it then, in the cold light of day, and you can barely believe how you were living.
The 'high' that comes with reconciliation has to be seen within the context of someone who has been effectively brainwashed, conditioned to respond to those cues, and utterly trapped in the situation - mentally, as well as often physically (plus emotionally, financially etc).
I'm not quite sure how to describe it - it's the 'high' of temporary relief from stress. It's a prisoner being awarded a privilege, briefly. It's not a real 'high'. There's the 'boiling frog' problem, plus being addled by manipulation and coercion, fear, gaslighting, confusion and stress to the point one is not in right mind.
I would say the absolute worst thing about being abused, is that one is often not aware one is being abused.