Well, it's definitely not considered the "norm" in society. But you are aware that this imaginary friend is not real, and you only talk to this friend when you're alone. Personally, I don't see the harm unless having this imaginary friend is stopping you from socializing with others. If not, then I really don't see the issue. Like Lexi said, this seems like a coping skill that you developed for when you are alone.

I think it comes down to whether or not this concerns you. If you are concerned, then maybe a change would be good. If not, then no change is needed!

I remember when I had an imaginary friend...I was about 8 years old. Her name was Megan, and she lived in the front tree in the yard. Until one day, I had her fall out of a tree, break her leg, and go to the hospital. And she never came back...pretty morbid, eh?