L.K.
It's very normal for a baby to wake up that much at this age. He might really be hungry, but mostly he probly just needs you. Please go to www.askdrsears.com and read up on sleep. My 15 month old still wakes up 2-4 times a night.
I think it helps that I don't look at the clock so that I don't know how little sleep I'm getting. He also sleeps next to me so all I have to do is roll over and either nurse him or just pat his back. These are just a couple things I do to make it easier to take care of him at night time. Please go to the web site it has really helped me. Trust me, I want sleep! But it's more important to me that I am doing what feels right when it comes to being there for my son.