Please help me, I feel awful...?

That just sounded like a beautiful relationship between a teacher and a student (Not in the perverted way) But in the most innocent of cases. The wife may have seen it as something else, maybe he did drink some and she knew it, but the way it seems to me is that he probably saw you as a daughter and it was probably a very emotional time for him, the wife may not have seen that, but that is the life of a teacher. Hun, you shouldn't feel bad, you probably made his night by showing him how much he means to you as a mentor and as a friend.