Isaac grunts in pain when he's moved, but the sound of Stiles' heart beat under his ear is enough to help him relax almost straight away, turning his head to brush his nose against his shirt.

He shakes his head again. "Don't close your heart to love, Stiles. I don't want you to be with someone else. My gut rolls at the thought of someone else touching you. But I don't want you to be alone. You have too much love in you for that." And in the end that won out over the horror at the idea of someone else getting to have Stiles forever.

The more time the passed, the harder it got for Isaac to breathe and he knew, he just knew that he didn't have much longer. His heart rate was slowing and each breath was shallower.

"Promise me one last thing? Promise me you'll tell Derek thank you for me? Because, despite all the shit that has come with being a wolf, there's been good. And the best thing the bite brought me was you. So tell Derek, thank you for giving me that. I love you. Never forget that."

His eyes flutter and tears fall. He knows he doesn't have long, minutes maybe, but he needs to hear Stiles promise. Needs it more than he needs air in that moment.