I have to say that my instinct, considering that you and B have just had the initial conversation, would be to take things slowly and plan for a meeting in June when you are in NYC in any case. You could drop that you will be in NYC into a conversation and make it a casual meeting....no pressure, and by that time you guys will be in full friendship mode....
If you were to arrange a visit earlier than that would you call B and drop it casually into the conversation, or would you call to let him know you were visiting NYC and could maybe meet up? Sorry for the questions! I am trying to get a feel for how quickly you're expecting things to move! I gt thee impression that it's quickly, but I have to say that I would probably hold off (but I am a slow-burning type I guess!)
L.xx
Walk on, walk on, with hope in your heart. And you'll never walk alone.
