My biggest suggestion without knowing how old your little boy is, is to try to make the transition over the weekend, when your husband might be available to help. It can be tiring, but what we found worked for our daughter, was introducing the bed on a saturday morning, and we made a big deal over the idea of sleeping in a big girl bed, bought special sheets that had her favorite character on them...and then when naptime rolled around we explained to her that when nap time was over, we would come and get her just like we did from the crib. If she got out, we didn't talk to her, just walked her back to her room and told her it was time to get up. We did this everytime, without making a big deal (even when you're frustrated beyond belief....) of it, and eventually after an hour of getting up every few minutes, she got tired of the "game" she wasn't getting the response she wanted, she was being placed back in the bed, without interaction and no more kisses, hugs, etc. It took two nap times and a bed time. My husband and I took turns so that we didn't have to endure the monotony on our own, and it showed her that no matter what she did, mommy and daddy were united on what they would do in response. (This has also worked with a later episode of being "scared" of her room). It's hard work, but it does pay off.