Donnie had been obsessed, we know this already. But you, oblivious, poor you. Months after being his closest companion he would figure out ways to keep you by his side at all times. Ways that could harm you but never kill you. So that's what he did. He gave you a “medicine” to help treat some common colds, but as days went on you felt even worse. And worse.. and worse- until you refused to leave Donnies side in fear you would collapse in public without him, or run out of medicine without him. So you stayed in the lair for the time being “Oh you poor thing.. Do you still feel sick?”