How do you approach your boyfriend if he likes someone else?

tell him exactly how you feel, either explain to him that it would hurt you,but if he wants to be with another person so be it. you'll move on,life goes on & if he is that stupid.. then you most definently don't need him. he isn't worth your tears,so don't cry, be strong and stay positive. Try to find someone new. it may take time,but that right person will come along somewhere in time :)