If its a therapist and you being single, I would usually say either "there are plenty of fish in the sea" or "there are a lot of girls turning into adults every day."
However, I don't know you personally so you can take my advise with a grain of salt. If that is what makes you happy at the end of the day who are we to tell you not to take it, it will be up to you. Just make sure you are ready to deal with the different scenarios that may come cos sometimes trouble will look for you. Once you become become closer, you will have demands and prepare yourself if some of those can't be met. Are you ready to accept those terms?
Falling for a therapist is like being in a hedgehog's dilemma.
Best of luck.