So I'm over 30 now and I still sleep with my teddy bear that I had from my early teens. I need him to get a good nights sleep and without him, I can sleep, but I can't be comfortable. I always bring the teddy bear when I travel someplace overnight and usually am still holding him when I wake up. My girlfriends have mostly gotten along with the teddy and I can cuddle with them for part of the night, but when I wake up, I'm usually holding the teddy bear and not them. Also even though I sleep with a bear that is a "him", its non-sexual and I'm not gay.
If someone starts talking bad about the teddy bear I'll personify it and tell them that he doesn't appreciate such talk and has ways of making them suffer or pay if they aren't nice to him.
I know it's not "normal"... but how crazy it is?
I suggest you force yourself to stop sleeping with the bear, even for a week, but have it near, on or in the night stand, on a shelf, somewhere close. Slowly branch away from it without completely and all of a sudden just putting it in a box or something.
If you ask me for the honest truth, you are 30. thats all that needs to be said man.. good luck