Co-sleep weaning

My son is 15 months old. I would always rock him to sleep then put him in his crib. A few hours later he would wake up and I would be so tired that I would just pick him up and he would sleep with me and my husband the rest of the night. Well, my husband left for work out of state and I messed up by letting our son sleep with me every single night going on for a few weeks. Now he doesn't want to even be put in his bed. I have tried the cry out method, but he will literally cry for a whole entire hour. He won't give up. Any tips appreciated on how to make this transition any easier? I give him a bath closer to bed time that way he will be relaxed and sleepy. He wakes up before he even hits the crib.