My Dirty Little Secret by Nicole Watson (paperback)
For the first time in her life McKenzie Mitchell has freedom. College life is better than she could have imagine, especially with all of the parties and the cute guys vying for her attention. As her entrance in adulthood progresses, McKenzie realizes she may have bitten off more than she chew. Suddenly college doesn't seem so perfect, but it's too late to turn back now. Will her naivety get her into trouble or will she be able to learn some street smarts in time to save her?