Hook and Charming standing next to their true loves. Seriously, this scene alone confirms it in my eyes. Hook has become a part of the Charming family, because his place is where Emma is
(and because Charming has a major mancrush on him). He’s a part of their little “I will always find you”-club. We don’t get scenes like that with Neal.
Also, what does he do in this scene? Hook comforts Emma and tries to assure her that Neal will turn up again. And he does that despite his love for her and the fact that he thinks he has to give Neal and Emma their fair shot at happiness
(snort). How can you not love that character?