Hi J.,
I had a similiar situation. (she didnt sleep in our bed but she wouldn't sleep unless I was holding her...so I thought.)Turns out my baby just didn't like her co-sleeper. Once I realized that it was ok to put her down, she fell in love with her crib.
8 weeks is really young.....my pediatrician said that you cannot spoil a baby that young. (My friend, that has a Masters in Early Childhood Education, said that you will be able to tell when your child gets to the age when he is manipulating you with his crying.)
It wouldnt hurt to give all of these a try......put him in his; car seat, swing, stand under the ceiling fan and rock him until he falls asleep, walk outside with him for a few minutes when he crys, go into a different room, (sometimes a room/atmosphere change does the trick.) Or try lulling him to sleep with a crib toy. (mine loves her Fisher Price Ocean Wonders Aquarium)
I think that the suggestion of having a consistant nightime routine is the best. Do the same thing with him every night, and he will learn it is bedtime and go to sleep where you want him to.
I know its hard, especially since you are not getting much sleep......keep the faith, YOU WILL get more sleep and so will he.
I bought "On Becoming Babywise" and it helped us a lot, too.
Good luck
T.