My thoughts are that it's not her friend that she was a bitch too, but someone else and her friend is close with that person, but they just don't know it's them.
I can't think who the boyfriend is going look for, as I want to say something like person causing issue for sua, but doesn't feel right.
I think he is doing for her as suspects something deeper, but also got issues with how she's acting and put a tracker in that card or something.