I think she's a little young to know which side of the fence she's on yet. She may be in the experimenting phase, give her a few years, then she'll be sure. I didn't know anyone that age who knew whether they were heterosexual or homosexual, by the time they reached 18 or 19, then they knew (I knew a few people in my years, none at that age came out and said anything about it to anyone, but then again my childhood was in a different time, and it wasn't as acceptable almost 30 years ago. But by the time we all reached 20 they were sure what they wanted). At 13, it's too early to be worried about things like that. She thinks she's pretty sure, but at that age, I doubt it, probably just a phase. Now if she were 18 or 19 years old, I'd say it's a safe bet that's the choice she wants in life.