I'm glad you were saved from some very nasty possible scenarios involving this looser. You must think of this all it the proper frame of mind. YOU didn't ruin his life. He did that all on his own. YOU shouldn't be questioned for going out with a 27 year old...HE should be questioning why he needs to be with someone clearly out of appropriate age range. Even if he WAS 27, most 27 year old men don't date teenagers. Clearly he's looking for someone young that he can control. Onyl YOU can give him that control. It belongs to you!
I think you explained everything fine in your first post. Stay safe and don't let him take away the loving person you are.
Claudia