Secrets.
When it came to secrets that he was willing to take to the grave, Derek thought that he was done with all of that. He had been willing to die without ever telling a single soul about his insomnia.
When the truth had finally come out, Derek had felt as though a huge weight had been removed from his shoulders and he had made a promise to himself to never ever go back to that. But now it seemed that he would have no choice.
Unlike the insomnia secret, that had had him feeling as though he were weighed down. This new secret had butterflies swimming around in Derek's stomach, his heart threatening to burst with joy. Before he knew it, his shoulders were shaking and he was laughing.
A proper laugh that had him wiping tears from his eyes when he finally stopped, his sides hurting.