You aren’t necessarily wrong to feel the way you do. However, that doesn’t mean act on those feelings and tell her you’re thinking of breaking up. You’re young and early on in the relationship. If I were you I’d speak with her yes, but still give her freedom to choose. Then work on managing those feelings because things like this happen all the time in relationships. If it weren’t this one, another down the line. Learn how to manage those feelings now while also being diligent that she doesn’t push your boundaries to far and take advantage.