I’d like to know just what you are getting out of this relationship with Mr. Dream Boat. The opportunity to be the understanding good sport? The person who smooths life over for a bid lovable kid? What?
It’s going to be a shame for the daughter if you depart - but for your own sanity I urge you to take a good long look at all the red lights, flashing clanging, bells, and every other one of the dozens of warning signs that appear to be accompanying this relationship. Right now you’re not legally attached and their are no children of your own in the picture.