Let’s not be too quick to pathologize this. Yes, you have a very active imagination, but that doesn’t mean that you’re not OK. Turn on the TV, go to the movies, read books of fiction. Creative people have very active imaginations and often explore emotions and ways of being in the world through being other characters.
I’d recommend taking a creative writing course or film course. My guess is you’re not getting a chance to use the gift of your imagination.
I’m certain your school has these outlets. Find teachers who celebrate creativity and fellow students whose imagination and creative energy matches yours.
Wishing you patience and peace,
Proof Positive Blog @ PsychCentral