He either rambles on and on, quite coherently if nothing he says is very sensible, or he takes the liberty to bumble whilst talking to me.
I call it bumbling because I find it adorable. He's a very shy boy, so of course he doesn't like to speak too loudly just in case he might offend someone, or someone may hear what he wants them to hear, though not have exactly the reaction he was looking for.
Everything is mumbling except for the softest words he has to say, or the sweetest words that stumble out of his mouth.