I had a similar situation in a college dorm at age 18. My friend didn't want to get in trouble so just tried to babysit me. I had severe alcohol poisoning and was sick for days. I am still good friends with that guy, but have realized I need to say no to him quite a bit.
Honestly if you are in America, he _might_ have done you a favor as the emergency ride to the hospital costs about 5k (not great for college students), let alone the medical bill. It's always better safe than sorry though.