I'm 16 and have imaginary friends?

Imaginary friends are what kids do at ages 4 to at most 8ish. It is very rare to have an imaginary friend at age 16. At the adolescent years, people prefer friendships that are real and won't have to have imaginary friends to fill the void. Generally, you should outgrow it before you know it. In the meantime, try crating like a comic/novel of your adventures. Who knows, you can write the next Harry Potter saga just don't make it crappy like twilight or Steig Larson!