Oh, for Christ's sake! A hooker with tender feelings? WTF?
You didn't do anything wrong! She was looking for an excuse to push you away. You provided her with one (albeit a lame one), and she ran with it.
Because I am not in love with her, I can be somewhat more objective:
She is a project. Not a friend. Not a girlfriend. And your odds are about as good as at the blackjack table.
Confront and sever. Walk away.