Why are you so bonely, my friend? I am at least glad that you are not boneless.
Bonely Friend
Explanation
Explain Bear
Alright, listen up, buttercup. This joke is playing on the word "lonely." But instead of "lonely," the joke says "bonely" because skeletons have bones. And you? Well, you've got the brainpower of a gummy bear, so I'm not surprised you didn't catch that.