It was too late to apologize now. Sorry just wouldn't cover it anymore. But he knew if he let her walk away now, her stubbornness would ensure that they would never talk again. Despite the dark words, that had never been his goal. At the beginning, he had been so excited. He had wanted her to see the vast opportunity before them, and embark upon a grand adventure together. Wasn't that what friends were supposed to do? Where had it gone wrong? Why had she been so angry with him, right from the beginning? Why couldn't she just have been her usual overenthusiastic, blunt, risk-taking self?
"Oh, very good, very good," he said to her retreating back, hands beating out a slow clap. "Run away, be your usual stubborn self and decide that you are going to be perfectly 'self-sufficient'. And then, when you get yourself hurt, you'll never be able to get back to this moment. Every choice causes a change, and there is no way to undo it.
"I made a choice too, Cas. I made that choice when I realized that, for the first time in my life, I was consumed by a complete passion about something. I didn't realize that taking four days to truly figure it out would completely spoil everything between us. I thought we knew each other better than that."
They had always shared everything that made them excited, movies, video games, books. He couldn't see how this was any different from that, and couldn't see why she had been so mad at him. He was ready to share now, had been all excited to invite her into a new and colorful world. And instead she had yelled at him, and he hadn't been willing to let it go at that.
"Why did you come here so incredibly resentful of me, Cas? What made you so angry that four days would be enough to completely turn you against me?
"Or you can walk away, silent and bitter, and stay that way for the rest of your life."