That guy is right. You can´t attack someone like that...You must let it go, girl... Then stalk the asswit, learn where he lives, his habits and routines and wait for the best moment when he´s alone and vulnerable to strike and kill him without any witnesses.
I think this is te first time I´ve seen a nurse actually cockblocking a couple.... Usually they are far away in distant lands while students have lots of sex in the schools' infermary...