Too scared to bring my boyfriend home to my parents

So its nothing to do with the fact that my boyfriend is rude or anything it’s just my parents. I have told them too much information about him and they don’t seem to have a liking towards him. He is an amazing guy. I have met his parents and sister and nieces and they are all lovely amazing people. It’s just my parents. He met my Granny a few days ago and my mum told my Granny not to let us upstairs as I think that she knows that we do things. I was so embarrased and I don’t know what to do