Vivianne, can your dh go to him at night and try to settle him with just rocking or other soothing? Maybe he is smelling the milk and becoming agitated even if he isn't really hungry.
I have also heard that it can help to separate nursing from sleep in the bedtime routine... so instead of doing bath, book, boob, bed, you would do bath, boob, book, bed, for example. We are trying that approach currently with our almost 7-month-old--I feed her and then DH reads a book or two with her, rocks her, and puts her in her crib. I guess the idea is to help them develop the ability to put themselves to sleep without being too dependent on the nipple. However, I like nursing her to sleep and still do so at night wakings, so I guess I can't say if the change in bedtime routine is really making that much difference.
The other thing we are starting to do is putting her in her swing to go to sleep, especially for naps (she's still small enough that she can use it). The swing is soothing enough that she can be put in it after bedtime routine and we say "night night Evy, sleep tight, we love you" etc. and leave the room, and she is able to put herself to sleep without getting upset. They say that a lot of sleep problems in 6-month-olds and older are related to circumstances being one way when they go to sleep (e.g. Mommy or Daddy is in the room, patting or nursing them), and another way when they wake up (all alone in a quiet room). I have to admit we didn't really work on this enough when she was younger, so now we are trying to help her develop those "going to sleep" skills before she gets too much older. I hate to see her waking up crying multiple times per night--I try really hard to help her get enough sleep to feel rested, and it just doesn't seem like she gets that if she has a bad night, up and down all night etc.
I would like to cosleep but I'm obese, so it's not considered safe. So every time she wakes up at night it's a full waking and it's kind of hard on all of us.