Why is he so stupid?

So here's the thing, I'm a transferee with some friends in a new school through online class. And someone confessed to one of my dear, and it seems like even he wasn't dumped he got turned off with how she replies. And you know what that freaking guy is in my inbox now, saying he's being charming to me just because he made the first move.

Of course there's no way I'll entertain him, so after a week of ignoring me. He tried to persuade my friend again, like hey you need some check up.

I'll just ignore him for the rest of my life, what do you guys think?