What do you call someone, who finds it easier to express himself in writing rather than in person?

I might be textrovert...

I'm a textrovert and an introvert. The older I get, the more I dislike even email. I prefer texting, never answer the phone unless I know who it is and I love hanging with friends and family. It's been hard trying to fit in an extrovert world.

Who calls them that? Not the dictionary.