Simon was bleeding too much.
It's been too long since you called for help and they still weren't there. The more time passed, the more your stress increased. You can't lose Simon. Not now, not like this, ever. Your head was pounding with thoughts, your mouth dry as you prayed in your heart for help. Whether divine or human, please someone come and help you both.
Simon, for his part, seemed to be ready for whatever was coming to take him. Blood was seeping through his clothes, his gear lying on his side. His eyes were slightly gassy from the lack of air, his hands shaking as they put pressure on his wound.
And as usual, he couldn't help but make one of his unfunny jokes "Hey... wouldn't it be funny if this night was the last time we ever talk to each other?"
What made you dread wasn't even his words, but the broken and at the same time too calm tone of your friend.