Well everything ;D It's so hard to explain d; It's everything from their chemestry, to how they work together, to how they want eachother(their looks, hugs, and when you can see they want to kiss, or almost get closer of pure energy, but they have to behavie themselfs), and their convesations, and gifts, and savings ect. ;D
hahaha i SO agree with natulle!
its just everything about them, like that obviousness that everyone knows that they should be together, but they dont see it. and deep down they know everyone is right.
the secret looks ;)
just everything :D