This is really a matter of personal opinion, depending on which parenting style you subscribe to. If you are bed-sharing, I wonder, are you an attachment parenting family? If so, I would say that if bed-sharing is no longer working for everyone, try a bassinet beside the bed. If this doesnt work, I guess go to a crib in another room, but I would try everything else first. 6 weeks is rather young for a baby to be all by himself. Night-time is scary for babies, and if hes all alone, he will get scared. He may very well sleep better in his own space, but close at hand, so try the bassinet. My son was in a bassinet, then a crib, in our room until he was 9 months old, and hes a happy boy and a great sleeper, in his own room, now at 12 months.