Hi B.,
I know when my son was little like that, a lot of time it was harder for ME to change things up than it was for him! I always felt like "if it's not broke..." But sometimes we've got to take charge and make a change. The older he gets, the harder it will be for him to get used to his own crib/room.
There are a lot of things you can do to get him to prefer his new room. Cool night light, soft relaxing music on a CD player, projector that shows the constellations on the ceiling, etc, etc, etc. Just establish a routine including the crib and stick with it. Get a good video monitor to use so you can keep an eye on him.
I have heard that when a baby sleeps in the same room as the parents, the parents disturb the baby more than the baby disturbs the parents. Good luck!