Can someone help me with the name of this movie?

i use to watch this when i was younger...i think the girl is a teenage girl and she is dating an older guy and the dad really doesnt like him and one day he like comes to their house and the dad asks him to leave or something and then he goes out to his car and starts like punching himself to make it look like the dad did it to him..and then in the end he like kills the families dog and shoves its head through the doggy door and it all ends by the girl pushing him out the window i think....ha anyone know the name?