You know, your probably right and he probably is a BL, but you don't really know that for sure. And if he IS a BL, you really don't know what his true intentions towards those boys are. I think you should get to know the guy better; become his friend. That wouldn't be such a bad thing to do and who knows, you might become a kind of mentor for him. At any rate it would help to ease your mind about the questions you have about him.

Chris