How can I have an enjoyable holiday with New boyfriend, and resentful teenagers?

I am about to go on holiday with my two twins, they hate my boyfriends guts,because their jealous of him, and I can't live with out him, i'm thinking that this holiday will be a good chance for us to let our hair down, and for them to get to know him better, what kind of things can we do, to brings us together on this holiday