In my book, Luke has absolutely nothing to be jealous about. There are some mistakes that he has made with women. Like Roz Kelly, he said something about wanting to go out with other women while going with her. She didn't take too well to it. When he said he wasn't sure whether he could stick to one woman or not, I would not get mad at him. I would just tell him "I think you can do it, I have all the faith in the world in you." which I would.