1. If your boyfriend (or girlfriend) is going to cheat on you, then s/he is going to cheat on you, and there will be nothing you can do, short of locking him or her in an inescapable cell; likewise, if your boyfriend (or girlfriend) is not someone who would cheat on you, then he or she is not going to cheat on you. The decision to cheat is his/her own to make, and you ultimately have no control over his or her actions.
2. Therefore, all you can do is be best person you can be, and when in doubt, remind yourself that s/he has chosen to be with you for a reason. Jealousy will only weaken those reasons. If s/he wasn’t going to cheat on you in the first place, jealousy’s only going push him or her away, and if he or she was going to cheat on you, jealousy’s only going to hasten the process and lessen his or her sense of personal responsibility.
