A guy I know through football sent me a Facebook friend request some years ago which I accepted. We were on the same discussion pages. He unfriended me for no reason then sent another request which I accepted and he unfriended me again. Yesterday he sent yet another friend request which I'm not accepting as it's stupid and I don't care about talking with him anyway. I do know him in real life from football.
Absolutely no hint of romance in this, but why do it? It's weird.