my 16 year old dd has just broken up with her first boyfriend (4 months), saying that she is bisexual. Thing is, I'm not sure that she really knows for sure. She says there isn't a girl she particularly likes and I don't know how she has come to the conclusion that she is bi. The conversation was cut short by her sibling coming in to the room and now she seems reluctant to open up further. I don't know how best to handle this, any advise?