What should I do?

My guy best friend likes me and I don’t know what to do.

My group of friends are a group of three people. Me, (G) and (B)-boy
G told me that B likes me, and that she’s upset cuz she thinks we might leave her for eachother.
I don’t like B, and she’s well aware, but he still tries to hangout with me more, and only talks about me when I’m not around.

I don’t like B, and I don’t want to lead him on, but at the same time I still enjoy hanging it with him because he’s my best friend.
He dosent even know that I know he likes me.

what do I do?
(I’m sorry if this is confusing)
What should I do?
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