I’m sorry she behaved in that way towards you. It is surprising how some people can so easily switch their emotions and use this to manipulate.
Perhaps the best thing you can do is put 100% of your focus into your psychotherapy practice. That is fascinating work. Continue to get experience with women, but treat it completely as enjoyment without involving your emotions whatsoever. Even if they seem to be getting emotionally attached to you, maintain that distance within yourself internally (edit: without leading them on of course, as it seems this girl may have done to you). It is a sad truth, but unfortunately the person who cares the least in a relationship will always hold the most power.
Hope you get through it quickly and keep striving forwards. This is just another plot point in your awesome journey.