After the Elsa had stalked away, she went back to her castle, and locked herself away. To be honest, she didn't want to see anyone. She was just having such a hard time processing all that had happened at the party, with him and Anna.
She had imagined what Anna's reaction would be when she found out over and over in her head. She had thought of every possible way that she would react-- but Anna's actual reaction was so vastly different from anything she had imagined, that it was almost impossible for her to believe it had actually happened. Not even in her wildest dreams did she imagine that Anna would give them her blessing.
Every time she thought about it, she cried. The way Hans had yelled, the way Anna had yelled, the way she had yelled... she just couldn't even fathom it. She didn't want anything to do with him now. She was done.
Which is why it was such a shock to her how, when she happened to look out the window and notice Hans on the beach, all alone, she was no longer in control of herself, and soon she was out the door and walking along the beach, straight for him.
She came to a stop right behind him, and couldn't help the words that came tumbling out of her mouth. "I love you, too, Hans!" she screamed. "I love you, too, and I'm sorry!"