Why am I so bad at studying?

I have 3 tests this week. One in sociology, one in astronomy and one in math. My sociology test is later today. I have been sitting here looking over notes for the past hour, and I realized that I am so bad at studying! I hate doing it! I have a roommate who is in the library 90% of the time and it seems like she's always studying and always got work to do. Don't get me wrong - I too, always have some sort of work to do, but when it comes to studying I just can't do it. I sit there and I re-read notes and I look over practice questions and I do all this stuff, but sometimes I feel like it doesn't help at all. This may just be my studying tactics. My best way to study is to teach people, but I'm not going to give my friends a lesson in scoiology, astronomy or math anytime soon, because I'm guaranteeing they'll stop listening after 10mins of me talking. I just know that I 100% dislike studying and I'm so bad at it. It's hard for me to stay focused on re-reading the things that I wrote no more than a week ago. I know what I wrote - it's just whether I remember what I wrote when it comes down to test-taking time. Anyway - I guess we'll find out later....