Eurobin, your situation sounds similar to mine. Sometime around 14/15 months, DS started going down in the crib, and slowly slept longer & longer there before joining us in bed. I think he was around 18 months the first time he slept all the way through, and it really shocked me. He's 27 months now, and really only joins us in bed if he's sick or has a bad dream or something...I sleep way better without him, he's latched on the whole time he's in bed with me when he is..and yet I miss co-sleeping. I thought he's be in our bed till he was at least 5. Who knows, maybe he'll come back before then!
DS 12/22/05 and DD 5/24/09