Is my best friend a lesibien?

My best friend, is always at my house. When she sleeps over, she will come into the bathroom when I am in the middle of taking a shower. She is always squeezing my butt and boobs, or smacking me on the butt. It sorta creeps me out. I don't know how to ask her if she is a lesibien, or how to ask her to stop any of it. If you could help at all it would be muchly appericated.