You can't tell 100% sure. Talk to him about it, but you have to have enough trust in him to believe what he says. If you don't have that much trust in him, then you may want to reconsider being with him. It's a hard thing to have a relationship with someone you don't have full trust in.
tell her that her boyfriend cheated on her. she needs to know.
how do you know if your boyfriend has cheated
you go and tell him you cheated on him and tell him how sorry you are and ask him to forgive you.
tell him you cheated on him
kiss them
He will tell you.. men never lie.
They may be jealous... Or hate you. Either way, tell him its not true.
You guys need to talk about this and consider your options. Goood Luck!
Tell him honestly & as soon as possible. Don't omit information, either. You were reckless. Since you cheated, face the consequences.
Lie and tell him you cheated on him... he'll tell you just to get even with you.
He will leave & you deserve it. YOU CHEATED ON HIM. It's not fair to him to be cheated on without knowing & it's unfair for you to leave HIM because YOU cheated. Cheating, if you want to cheat then face the consequences.
First off, tell your boyfriend. Second, you need to think about if you still want to be with your boyfriend and get things straightened out between you two.