You're a Brony. There are lots of them....

A relationship is only in your own heart and mind, when you think about it, and a real one can be just as intense as one that's not real-life.

Don't worry about talking with your therapist. There is nothing that they haven't heard before and are professionals.

You are wise to recognize that this might stop you from developing a healthy real life relationship and is becoming a problem for you. It will be okay.