It's not weird at all. And don't listen to those people who said you need professional help, it's not up to anyone to decide that besides you. I've had imaginary friends for years and I find they help me with my creativity in writing and drawing. One thing that I always remember when I have doubts about 'talking to myself' is that it is exactly that - just talking to yourself. It's not an unhealthy habit or some weird other entity talking to you. You're talking to yourself, but envisioning that other person you are talking to as somebody else. All this shows is that you have a great imagination. It's good to remember that you need real friends too though :) If you find yourself shy or you're scared to talk to people, just start by saying hi.