EBF baby at 17w still eating every 2 hours?

My EBF baby at 17 wo still eats every regularly every 2 hours, even at night. We have some nights where he will go 5 hours without a feed, and then typically after that it's every two. Im exhausted. He seems tired too. It's slowed down very slightly. But I'm just wondering if anyone else has this experience? Any advice? He also hasn't gained weight in a month. Hes getting tall, but not really heavy. Am I just not producing enough for him anymore?