Null pairings have actually happened in this show (quite the contrary), so it matters little if you are so specific. If we talk about fixing other relationships, then it's a whole other matter, of course. He and his ability have been quite essential in those events. But isn't it a tradition that a main character's special abilities are taken for granted and he won't score any extra points because of them? Otherwise he's kind of an energy saving dude of a mellow personality, so it's no wonder people aren't exactly flocking around him.