I suggest to you, Hangdai, and any other client/regular that has fantasies that a prostitute cares about them as a normal woman not as a low life service provider. Do the following test. Test Your Relationship with a Prostitute. It is simple, it doesn't cost you money or headaches, and it also reveals you the truth.
Whenever you feel the urge to meet the prostitute that you are infatuated with, take your phone and do text with her the following.
Regular (e.g. H): "Hi Honey!"
Prostitute (e.g. C): "Hi Baby!"
Regular (e.g. H): "I miss you!"
Prostitute (e.g. C): "I love you! Coming today?"
Regular (e.g. H): "Between us something is special. I will come to see you only if I don't pay you any tips. We just do it because we like each other. When can I come? Can I come today? Remember, no tips involved."
Wait for an answer, and Do Not go there until "your loved one" agrees with the fact that you don't pay her a dime for sex.
You repeat this anytime you think about that prostitute that torments your imagination. This will cure you in a few months in a healthy way. It will Test Your Relationship with a Prostitute. Try it, and let us know how it went...