The visions/dreams are the foundations of that Force bond that continues growing, the closest and more aware they're of each others presence (and from their points of view,
Maybe Kylo had a slightly doubt about Rey being the same person of his visions (or maybe part of him just didn't want to face that truth) and that's why he says "it is you" when
Friends trash talking at your back, coming again at you when they fought with another (ex)friend in common that was a jerk, comfort them and tell them you love them regardless all that,
Those who fell in the dark so deep and for so long that they themselves aren't able anymore to think that there's still hope, those who were allured by nihilism due to circumstances of the world
From their POV their family abandoned/betrayed them but they cope with that fact differently in the surface but similar deep down: Rey repressed the memory of her parents abandoning her,