Dear Annie: I’m a sophomore in high school. I never had much social stability as a child because my family moved around a lot and I was often in a different school every semester. I’ve always been that pretty girl who becomes an outcast as soon as she speaks or says something stupid.

My boyfriend goes to school in Florida and I only see him during long breaks. I haven’t seen him since before Christmas. My problem is that he told me that he is going to the military ball with a girl who he says he is just friends with, but I know that she gave him oral sex on the tennis court before we started dating. I want to trust him, but should I be concerned?