I have a ten week old. He falls asleep on the boob, then wakes through the night every 1.5-2 hours for more feeds. He's alert and happy in the day, cries for a couple of hours before bedtime which is generally around half ten. Has a long sleep in the afternoon. So my question, how do i get him to go for longer stretches at night, or should I just take his lead and it will eventually happen?