You have to get your own life. You can't live your girlfriend's for or through her. She's growing and changing and you're trying to keep things the same and that can't ever work. Life doesn't stand still.

Go visit a school counselor and make your own list of 10 things you'd like to do or experience that have nothing to do with your girlfriend. Have something "new" to talk to her about, something to share that you're doing. If you don't likee the books she's reading, what books do you want to read? I don't think you get "mad" at her, you get anxious she is growing beyond you, and that sounds like a legitimate worry to me. Get out of all the books and "do" something with others. What are you majoring in? Think of some active research you can do for a paper or project and get out and work on that and your own future. You just have to put your attention on yourself and your own development and then you won't be so "concerned" about your girlfriend and what she's doing for herself and her development.