Private cabin getaway in Ireland

I am looking to find somewhere in Ireland (northern included) where I can go stay at for a night or two for my boyfriend's 30th. I am looking for it to be a quiet and relaxing experience so somewhere near the coast and I love the cabin style, private areas with a bbq area and I really want a hot tub, or maybe a sauna. It would be nice if there were places nearby we could drive to for nice food, maybe some sort of water activity. I know it's probably a lot to ask for but I thought l'd try.