Is it sad that I'm 19 and I've never had a friend outside of the internet in my entire life?
It could be, how do you feel about having no real-life friends?
It's disappointing, becaue some of my online friends actually live close to me.
If you are tired of having only online friendships, it is a good idea to branch out. Perhaps you could ask your online friends in the neighborhood to meet up in person, or you could make some new in-person friends at a gym or a class.
It's okay since I don't want close friends. I think I'm getting too used to being and doing things alone now.
Even if you don't want to have close friends, you should go out side of your comfort zone and meet people outside of the internet because it's mentally healthy to do so.  Sometimes you have to do things you don't want to to do for the sake of your health.