You are a young desirable woman!
So why doesn't the cute kid in your biology class realize that?
Don't worry about being single (or as I often liked to call myself, "undateable") in high school or beyond.
Relationships are sometimes viewed as a status symbol in high school, like your life isn't complete until you have a significant other.
But your friends and family will still love you even if the cute bio kid doesn't, and you should love yourself, too!