Connie,
Everything with babies is a personal choice and what suits one family doesn't work for another. Your baby and you are an individual and therefore listen to all the advice even try it out if you like, but only keep doing something that feels right for the two of you. So taking the above into your mind I would give you this advice... (which in some circles can be considered a little unusual or 'alternative')
A 9 week old baby is still very young and whatever he/she asks for, be it feeding every 2 hours or rocking to go to sleep, or waking up several times a night is totally normal for his/her age. Many of their habits change, daily, weekly and sometimes monthly it all depends on the needs. I know its really hard work when they're that age and they need you such an awful lot that it can take its toll on every mum and dad, but continually responding to his needs for feeds in the nightime will increase your bond and his trust that he can rely on you when he needs you.
As a guideline research has shown (ask me to provide if you wish) that it is normal for an infant from birth to 2 years old to wake during the night for milk or reassurance from their parents. I know that a lot of advice from books and mums would tell you that babies SHOULD sleep through the night at 6 months and a few may do so by themselves with no encouragement, but the majority will not do this on their own. Some parents choose to enter into sleep training at 6 months to try and gain some control back over their families sleeping habits, a lot of these techniques are controversial in themselves so please do some good research and thinking before you go ahead. However all the people who use and advice these techniques would say don't use them before your child turns 6 months.
As an example, my daughter is now 13 months old and has never slept through the night. She now only wakes once, or occassionally twice and either needs some milk or a cuddle from mum and dad and she's straight back off to sleep. I have no idea when she will sleep through but I know that she won't still be waking when she's 13 so I tend not to worry! Hope that helped a little. 