I don't know this girl but, assuming she wants to be good and settle down with you, she won't do it until she's 1,000% sure of your committment.
Like most bargirls, she will keep all her lines in the water until she's got a fish in the boat. She won't truly commit to you until you're married, stable and secure - and both of you are far away from the P4P scene.
If she's been in the scene for long, she's heard a lot of empty promises. You can tell her lots of sweet stuff, but she won't believe it until your names are on paper. Is her name tattooed on you, yet?