M.C.
I co- slept with my dd quite a bit when she was that age.. She was breast fed, and it was a lot easier on me to have her in my bed.
When she slowed down on the night nursing around a year old, I would just put her in her crib after she fell asleep. If she woke up and cried, I just took her back to my bed. It didn't take too long until she realized that she wasn't going to be trapped and ignored in her crib, and she started soothing herself back to sleep in it.
She moved into her own bed full time when she fully weaned herself at 15 months... It took about 2 weeks of gradual transition, (putting her down asleep, then trying to comfort her to sleep while still in bed before picking her back up... Then just putting her down more and more awake.) then never had any issues. (That is putting her in it awake, and she fell asleep on her own and stayed all night.)
If co-sleeping is easier and works for you, just keep with it. :) especially since your kiddo is currently experiencing changes in his little body that would make doing a transition now more difficult for everyone involved.
Honestly, I am not a fan of CIO (I know it works for some families, bit I don't like it.). I did try it once around 9 months because a lot of people told me I needed to "sleep train" her... I felt so bad after 3 nights of sticking to my guns (using the Ferber method) and seeing her so upset that I decided to do it the way MY mommy instincts told me I should... And it worked out great. :) since then, I have done quite a bit of reading on the subject and have found that being left to cry releases stress hormones and can raise the baby's blood pressure. :(
I know I feel horrible after crying. My head hurts, I feel lonely, my nose is running... I hate the idea of those feelings being what my daughter is experiencing during her last waking hours of the day. Cuddles and giggles, and the security and comfort of her Mommy's arms is much preferable. :)