Your at a party dancing and doing things until a random guy came up to you and started being near you and Chad (he likes you) saw what was happening he waited to see until he did something

Ethan: Dude I think that guy is being a little too touchy towards y/n? Chad: I guess he is but if he lays a finger on her it's going to get violent Ethan: Violent you mean Like beating him up? Chad: Exactly

He was keeping an eye on you