My boyfriends dad doesn't like me

I've been with my boyfriend for over 7 months and recently we asked our parents about me sleeping over his this Saturday, my parents after some persuading and the embarrassing "talk" agreed, my boyfriends mum also agreed yet his dad seemed to have quite a problem with it and said he doesn't want it to be a regular thing and he's not comfortable with me staying over. I get the feeling he doesn't like me as when I'm round he's quite blunt with me and also my boyfriends past girlfriend had stayed round their house. I just don't know what I've done wrong