I think I may be crazy and losing my mind! ?

Okay, this is the first time I've ever asked a question on here, so please don't judge me too harshly. Ever since I was a child and alone in my room or wherever, I liked to pretend that there were "people" around me that I could talk to or have fun with. Most of the times, the "people" were mainly characters out of movies, tv shows, animes, and the like. I know perfectly well that they are imaginary and I have a good grasp on separating fantasy from reality, but as I grow older, I've noticed that I keep doing this. I've tried meditating, but I can never clear my mind long enough to do any good. I'm 22 years old, have a fiance that I've tried to explain this to, but I don't think I've made my situation very clear. I just don't know what to do anymore. Everytime I'm alone I start daydreaming to the point where I'm beginning to talk and act out loud to my imaginary people. Am I crazy?