What is A Writer?

A writer is more than someone who commits thoughts to paper. Simply acting out the verb "to write" is not enough. A writer has purpose. Whether they write to convey or express an idea, or they write for enjoyment, they have a purpose in mind. To me, someone writing only because they have to for school or work isn't a writer. There has to be some higher level of making meaning behind the writing.
A Facebook post or text message is literally writing, but the authors aren't necessarily writers because those messages have no special meaning behind them. Most people don't carefully consider words when making a short post. If someone were to actually take their time when writing a message, and attempt to convey something important in it, I would call it writing.
I consider myself a writer because I enjoy writing and take a certain amount of pride in something I write that I feel turns out well. Someone who writes a paper for a class just to get the grade, who doesn't really care about making meaning, isn't a writer. I guess to me, being a writer is more about having the right mindset than actually forming words on a page.