I know nothing with any certainty

Have you ever missed someone that was literally sitting right next to you? Like you start to realize that you’re not as close to each other as you once were. You still talk to them, but not as much as you used to. You still see them, yet it’s as if you’re looking at a stranger. It kinda sucks too because that special bond you once had with them just disappeared in thin air. They’re sitting so close to you, but you feel so distant from them. I fucking hate that feeling.