There are some good ideas on here, you just have to find what works for you. If he is really relaxed like you say, working on getting him off the boob before entirely asleep and the trying to pat the rest of the way might work well. After that you might be able to just pat. Once you have another way to help him get back off to sleep in his cot you can use it to cut some of the night feeds if he is still waking as often. You might find he doesn't. This worked for me but every baby is different. Co-sleeping does not work for us but might for you.