I swear if I didnt love her

It all boils down to a father that loves his daughter and the daughter while old enough by legal terms is an adult, she is still in HIS house as his daughter. His kid, his house, his rules! Be respectful. Things will calm down. Talk to your girlfriend. Not here. It's not our business. (that's the problem with today's society, to many want to make their private lives un private!) Wait for him to come to you. When he does, make it clear what your intentions are. Obviously he's not seeing the fact that you've been together 2.5 years. That in itself speak volumes. About the both of you. And if the conversation gets hurtful, or argumentative, tell him you mean no disrespect but your going to have to walk away till things cool down then continue. You don't want to jeopardize the relationship between them or yourselves just to say something one of you will regret later.
Just some advice as a father.