I cant think of the name of a film that i have seen ...?

Its about this guy and he starts going out with this girl but she is
blind. The things in his house are weird and creepy but she cant see
them. He goes out and kills people without her knowing.

im not even sure of the actors in this movie i just really want to
know the name.
If anyone can help i would be grateful as it is wrecking my head as to
what the name is.
thank you :)