Transitioning cosleeping toddler into his own bed problems?

I had the same problems with my first child, who slept in my bed until he was 6 months old. Eventually I just had to let him cry it out, even though it felt as if it was killing both him and me. Only once did he vomit, and then you just go in without switching the light on, clean up quietly without looking at him or picking him up, and then just put a towel over the wet patch. Once they know that you are not going to come to his cry, he will give it up, but the process is pretty gruelling, and you've got to harden your heart and be absolutely consistent from the word go. It's a good idea to start off by putting him in your room next to your bed and then ever so slowly moving him away. You could try putting him in a separate room for naps, also. Good luck.