These years can be exasperating! Fortunately, guys and girls keep growing up—emotionally and physically—and, one day, this situation will be different. For now, you could throw a T-shirt over your bikini, shop for a swimsuit that downplays your curves or figure out where you could enjoy a girls-only swim. Better still would be to take a deep breath and recognize that just about every girl is self-conscious about breast size, underarm hair, height, weight or an otherwise changing body. While your bod may feel foreign to you now, you will eventually feel more comfortable in your skin. And once everyone hits puberty, no one will care who got there first.