What sexuality am I? I like another girl, but am i bi?

[confused]

The fact that im asking this question would instantly suggest that im not 100% straight, but i don't know exactly what i am. I'm a 16yr old female, and have always had an attraction towards male's, however there has been a few occasions where i have really liked another girl. At the moment, i'm really liking another girl, though she is straight and has a boyfriend, and i know that she is not interested. But im not sexually attracted to her, nor have i ever been towards another girl. I feel the farthest i could go would be a kiss. I am, however, sexually attracted towards males, and have had boyfriends in the past, but am now confused at exactly what sexuality i am. Does this mean im bi? Please answer x