Not for me. I'm too egotistical an ENFP to give a damn about someone who does not worship me (and then I become suspicious). That could the Leo/Dragon in me talking but still. ...don't have time for non-worship.
I'm really protective of ENFPs for some reason. I think I've seen some who have trouble letting go, but only when they are confused about the end. ENFJs need a similar closure, but I think they may be better equipped to give it to themselves even if the outside signals are mixed. I think usually ENFPs end a relationship themselves unless there are too many unanswered questions & then maybe they get hooked. The OP seems to be focusing on giving the mixed signals (like the stupid notion that it's sound to have sex with an ex who wants more) that probably would cause more unhealthy attachment for the ENFP, but only if he/she was already hooked for some reason and looking for closure or resolution.
"In my soul rages a battle without victor. Between faith without proof and reason without charm." - Sully Prudhomme
this made me giggle! ah, but then there are the mature enfp's who see that you are doing these things and *!with a flip of the evil switch!* pull the rug out from under you!! mwahaha. i did that once. told some guy "im not going anywhere. blah blah blah" after he said something along the lines of "im like a snake. and what happens when you mess with snakes? you get bit. HISS!!" like that was a hilarious thing to say. so i never said anything to him again. and i moved. PRICELESS! and he's, like, a writer 'n' shit, so i got the added bonus of being able to see the ill effects of my dissapearnce in a beautiful artistic form without ever seeing the j/o again . Me FTW!
I will buy you a drink and I'll tell you what I think, and tomorrow, in the morning, I won't be sorry that I didn't sleep.