You are right that this is a very cute couple. But I'm hesitant to say that couples who get together on tv will actually last in a long-term relationship. While I've never personally been on a tv show or spent intense hours practicing to be on tv, I think the adrenaline from acting and performing together is really where the excitement comes from. I think once that "newness" passes, it becomes hard to keep a romance going, especially when the couple no longer shares anything in common.