Noiz Ratio, I've went through a somewhat similar phase when I was your age (6 years ago). Something to consider is whether you may be feeling differently about girls than boys simply because you may feel more emotionally connected with them at this time (When I was 14 I couldn't really relate well to most if not all boys at school and I never considered any for a relationship.)

Over my later teenage years I discovered that I could see myself dating both sexes if the person was right for me (I agree with TheWell's advice). I've been in a relationship with a guy for a few years now.