Hi R. - Just curious, are you certain he's genuinely not getting any milk when you nurse? After he comes off the breast, if you self-express, do you get anything? My daughter is 14 mos now and only nurses 2-3x/day, and I often feel that way (esp. since I'm so droopy now!), but I can tell she's still getting milk (self-expressing after, her giant post-nursing burps, etc.). Anyways, I have to disagree with one comment, your baby is not 'addicted' to the breast. This is all normal & natural, not to mention beneficial for your little one. However, if you're all set with nursing at this point, you try what I've known several moms to successfully do and tell him that your breasts don't work anymore?? Opposed to 'boobies all gone' b/c he knows they are still there. Maybe he would understand they 'don't work' (just as maybe he's seen a toy not work or run out of batteries??).
As for the sleeping, we kept my son in a crib until he was a couple months past 2, but he had been climbing in & out of his crib totally proficiently for several months. The difference for us was, he wouldn't climb out at bedtime or the middle of the night, even if he woke up, he just would stay in there if it was dark. SO if he's climbing in/out and you are worried about him falling, I'd say get a canopy OR make the switch to a bed. It's too much for you to be so on edge & stressed to try and get to him before something happens...
Good luck, and do what feels best for you & your family. All kids are different and what works for some may not work for others!