You won't, unless one of them tells you.
Don't touch it with a ten foot pole.
how do you know if your boyfriend has cheated
RunningFredcheats are you they cheat and you don't know they cheated or you do know they have cheated
gurl dhrama is my cousin sistas girlfriend, but she cheated on my cousin. mmmmmh. sistas always gotta do it our own way, mmh, xoxo princess.
He doesn't have a cousin...That we know of...
Ask him or her.
ask his teacher
If he was cheated on then it was bad enough that he got cheated on but now a bunch of strangers know too. Please respect Yamashita's private life.
You ask him.
tell her that her boyfriend cheated on her. she needs to know.
Whatever you want.
The only way to know for sure a person has cheated is to see it with your own eyes. You can also ask the boy and see if he will admit to cheating.