girls stayed with girls and we were also jealous or unhappy if our female friend played with others. But that does not mean you are les. But a lot of literary (i prefer to call them 'novel', 'movie') described homo at teenages. I think its quite a big misleading to younth.
Sex education in that stage is important, so as the social influence, to enhance their incline.
I do not play it low upon homo. If one really is sure abt his/her preference. I also feel hot when i saw nice figure from girl. But you should be clear that it is an incline or just appreciation. Anyway, everybody likes beauty, no matter male or female.
One can also change their incline. In one words, as long as you are confortable with.