Ah, yes, cooperating like a normal person. Because that stopped everyone from killing each other with great success. So many motives were ignored and people were saved thanks to everyone being friends and cooperating.

[If you're going to be resentful, he can be equally so. After all, it was your girlfriend who talked the most about working together and being friends that kicked off the killing game in the first place.]

I wanted to stop it because I hated the killing game.

[Yup. That was a lie too...]