Your girlfriend is a member of a shadowy organization bent on ruling the world, your best friend is a CIA operative, and your dog is an escaped experiment who talks when no one is looking. You run a website debunking conspiracy theories.
After years of gentle persuasion your best friend since childhood finally agrees to seek professional help for serious mental problems. Much to your dismay, as she begins to improve you slowly start to realize that you are her imaginary friend.
Sometimes I'll act as if I'm another character, talking to the character that I can't name. I act as if I'm telling at them, and suddenly I be like, "Why would you do that, [insert random name i come up with on the spot] .