As long as you acknowledge they're not real, and they're not causing you any problems, then there's no need to seek out any help unless you really want to.
Don't worry, you're fine. :)
"The only normal people are the ones you don't know very well."
I still want to know about these imaginary friends and their personalities.
I used to play with legos for hours alone building things and being creative. So I appriciate a good imagination.
Tell me about yours. It's more interesting than the usual boring stuff.