High school is not the end of your life. I repeat: High school is not the end of your life.
High school is weird for everyone, popular and not included. It really only exists to acclimate you to the real world.
Try responding to their advances, and if they laugh at you call them "a bunch of wizened dicked bitches" and move on. The way I sense it though it doesn't seems like they are not toying with you.