Ah
The ol, "fell for an escort and it all went to shit".
Tale as old as time
As a previous hopeless romantic as well. I get where you're coming from.
I won't reiterate what's been said so far. There are pretty good insights here.
One thing that really helped me, was to just write a long message to her. (usually I leave the warnings till the end, Dr Strange style. Before you ask, because it's usually hilarious. But you're somewhat vulnerable right now, I know I was when I was in that situation so:
***For the love of God DO NOT SEND IT***
Also, write it by hand. That one's just a suggestion)
Spill out your entire perspective about the experience. What you felt going in. What you hoped/imagined it would be. How you felt and how you feel now.
Read it a few times, let your experience sink in and process it.
***Keep it safe and hidden from other people, this is for you.***
Pay attention to your own feelings, process them. Learn what you can and let them go.
When you can think of the whole situation. Without feeling sad or angry, delete/burn it. (But just the message, don't burn anything down ffs).
Wounds heal, people learn. What you learn and how fast you learn it will be different. Sometimes we have to go through the lesson several times because we didn't learn the right thing before.
Good luck