Men ... there will always be one or two liars, but you can't kill us with a stick. You said that you have more pain than happiness with your boyfriend, so how did all this pain come from? Don't trust each other or feel nothing? Since it hurts, why not let go? In addition, you said that you are still very happy together, so where does happiness come from? Didn't you two build it together? Did you lie to him, or did he lie to you, or did you two lie to each other every day? Then why did you cheat? Are they things you can't say or are they dusty secrets in your heart? Maybe he (you) just doesn't want to make things more embarrassing between you when he (he) cheats you. Maybe you can think about his or her inner activities when he or she cheated you from the other person's point of view, so as to understand his or her feelings.