Hi Rugh - Wow - all excellent responses and advice for you here!
This is KEY. In his own bed, all night. May take a few sleepless nights on your part, but then all will be well.
There is nothing more important in parenting that a child knowing that his parents mean what they say. Kind and loving is key in this case (and usually all cases!), but under no circumstances does he come into your bed or regress to the crib.
Also - again, key... Are you encouraging him throughout the day about what a big boy he is?? Trying to get back in the crib is somewhat a form of regression - who wants to grow up? And the crib is familiar.
So - stand firm (gently). Sit near the bed and rub his back - but stay OUT of it! This too will pass.