So my friend is letting him in...again.!!And hes hurt her before.?

Were 16 year old girls, in junior year.So i have this friend, her name is amy. She decides to start making out with some random guy named erick. They makeout like everydaay after school for about two weeks, she becomes completley obsessed with him, brings him up in every conversation.Literally.Its annoying, its getting on my nerves and shes really making me NOT like him, because she talks about him sooo much. thats how bad it is. He started hella ignoring her and wouldnt even look at her, obviously he was using her and went back to his ex. He ignored her for about two and a half months. So suddenly he calls her last night, wondering if she wants to hang, (meaning, makeout) she didnt question him at all she just went. They madeout and he seriously told her that he didnt want a relationship, she didnt care. shes even willing to loose her virginity to him. i dont want her to get hurt again .... i know shes going to but is there anything i can do to knock some freakin sense into her *** ?