Boyfriend’s best friend...?

I want to start off by saying that I am completely in love with my boyfriend of two years.

My boyfriend has a best friend, and the entire time we have been together (I met his best friend the same day I met him), he’s given me a vibe that he’s into me. Before I started dating my boyfriend, he even admitted to this, albeit, drunk.

I would never encourage this in any way, and never have.

What’s strange is that my bf doesn’t see it, to a point where the other week he told me if anything ever happened to him, he wouldn’t be mad if I wound up with the best friend (which I think is weird).

Anyway, have any of you been in a situation like this? Let me know! Or just your thoughts xx