LOOKING FOR A OLD BOOK

im trying to find an old book i used to read. it was about two roomates in college. Alexandria, she was a rich girl she had an ex named tori(Victoria) and her roomate's name was hannah or something. there was another girl named brooke in it. Alexandria was very athletic she had hired a friend that was a fighter and had anger issues to find information on a man that was stalking her. PLEASE help