Ok but i would like to point out that when Finn and Rey reunited on Starkiller, Rey is the one who initiated the hug.
At the beginning of the movie, she (rightfully so) hated it when people touched her. A lifetime of being alone on Jakku made her wary, closed off and always on the defensive.
And yet, she gradually opens up to Finn as he proves himself to be kind, caring and brave. She willingly gives him her hand twice, and then she hugs him. It is full physical contact, something Rey probably hasn’t had in years. Hugging and being hugged means being utterly open and vulnerable - something Rey hates, but when it’s with Finn she doesn’t mind because she trusts him. Because he cares for her, because he came back like no else did. He’s probably the only person she feels safe enough with to let herself be this vulnerable.