Boy, You confuse me

Sequel to : a little too late
you're reasons for going to a different school confuse me.
you say "  You know how spiderman had to break up with MJ because if they stayed together then all the bad guys would hurt her? That's why" and you also said "Okay then its like at the end of the 6th harry potter book when harry dumps ginny because if he stays with her then voldemort and his cronies will go after her to get to him" when i didn't understan the first example.
but boy i'm still confused. What do you mean?