Ugh that pissy little pose just made Stiles feel bad that they were fighting on his birthday. Even if Derek brought it on himself. Also Stiles didn't know when to stop talking.

"Derek--" Stiles trailed off and was silent for a few moments as he tried to figure out what he wanted to say. "I don't know how this is going to work if we keep fighting each other on this. I keep saying this is for life and it seems like you aren't going to accept that and...I don't know, I feel like sometimes you'd be happier if I wasn't around so you wouldn't have to see it."