Then an incident occurred last saturday when I introduced him to my friends at a party. And since we consider each other boyfriends they were curious to meet him. They thought it would be fun to pour alcohol in his drink without him knowing, to see how he would act when he was drunk. They meant it as an innocent prank. Very quickly he felt sick, vomited, was very shaky, getting headaches, etc. Not drunk, just very ill and he fell unconscious.
We called an ambulance and was hospitalized for the night.
I'm sorry, that does not sound like and innocent prank to me. It sounds more like a stupid prank and more importantly a crime. I would be in the process of re evaluating my friends or in your boyfriends case his romantic interests friends.