As far as I know, a lot of guys prefer a little hair or nothing there, but in my experience, there have been times when I have all my hair down there and I've warned guys "I have hair down there.I forgot to shave" and they just said "Who cares?" and enjoyed it anyway. Most guys are just happy to be around a vagina at all. And if it's your boyfriend, ask him what he wants. He'll probably think that's really sexy.
you might want to keep it for him to shave it off with you on that night, but if somehow you know he doesn't like it then shave some of it and just keep a bit of it on, I don't think that no hair is really normal