"You are the only exception..."

Sam Tsui's cover of Paramore's "The Only Exception" is playing....

And then it hit me.

When I asked you to go to the beach with me over winter break....
You said it's too cold for that, but then you added, "Sure. Why not?"

That made me smile more for a tiny bit, but now it's just hurting.
What happened between us that everything change?