What should you do if you cheat on your boyfriend?

You don't say if you still are in love with him.Well anyway be honest with him.You both probably loved or still love each other.Don't you think if he means that much to you he deserves to know the truth.He might even suspect that you cheated on him and telling him lets him decide to move on with or without you.He will be hurt but I think he will be hurt more by lying to him.Someone said it's better not to know,but they've probably never been cheated on.And it's better to be honest.Marty