[molotom]

Your hand is ridiculously strong, and he sounds like a total tard, so you don't have to worry about balancing your play or making properly sized raises. You want to get another $10 in and it comes down to his tendencies as a player.

You need to bet here. I would consider a minbet or something if he is likely to raise (given earlier streets + your description), depends on how well you know him. If he just calls such a bet he is probably done with hand.

I think the most straightforward play here is to bet around $4.50, it gives him 5:1, he's likely to shove over the top, and if he calls, you can shove the remaining $6 on the river still giving him 5:1.