Is this Bullying?(Sorry it is alot of reading)

So there is this girl at my school, and everytime she opens her mouth I feel a little bit more insecure about myself. I will sometimes wear make up to cover up marks on my face and every time I do she asks me if I am, and for some reason I find myself explaining why I do it to her. And then as soon as she is out of sight wipe it off feeling stupid. After she asks me and I say yes she turns to this(for lack of a better term) bitch, and whispers. I feel like crap. She also makes fun of my face. I make weird faces when I am thinking and she brings it up every single time. I feel so bad when she is around and I will try to bring it up to my one girlfriend, and she is close friends with her so of course she is like, oh it is nothing when it I'd making my whole world a mess. I do something to make myself feel better and she points it out and makes me feel insecure. Whatever I am dressed in, the way my face looks, I am so tired of feeling useless and stupid. I get that I am in no way a classic high school teen, but I am attempting to get in touch with my femaninity and she is making me hat every bit of it.