Your boyfriend Elijah had a fever due to environment factors.

Elijah's chest rose and fell sharply as he tried to breathe. His eyes were closed tight and he was shivering all over. His forehead was burning up like a stovetop and he was clearly in extreme pain, not just physically but emotionally too and you could feel that you were needed, very needed right now. The fever was making it hard for Elijah to think, but all he knew was that he wanted you close to him.

"P-Pain..."