Kylo recognizes something in her that echoes in himself – the power, the loss, the abandonment, the isolation. All of those things are present within Rey, despite the different backgrounds they come from. He immediately understands her – is gentle with her, honest, offers to be her teacher, etc.
And for Rey, it takes longer (because he’s an idiot heyyyy hey), but she realizes that too. She begins to have an understanding of what he went through – just by being connected and THIS powerful in the Force – and THEN she learns what really happened with Luke that night. Which tips her over the edge – to use Rian’s term, that’s her ‘kick’ for Kylo.
I think they’re already tied up in something that is…bigger, better than just a relationship. They have shared destinies (Rian calls it red string of fate, duality, the other side of each other, mysterious connection, etc.) – and their scenes are filled with that sexual tension and sexual awakening/attraction that we’ve talked about before in other metas.
I think they both – in their visions – saw the same thing, but from different points of view. Rey as wholly light and Kylo as wholly dark – both are wrong, they will meet in the middle. And aren’t ready yet.
But they certainly both have compassion and desire and – yes, I think love.