A Whisper in the Ear of Us All

It's easy to bond to someone when they are the only one in your life. It's also easy to mourn someone when you've bonded with them so much and they leave your life. And it's even easier to hallucinate someone when you've become so bonded with them but then had to mourn them. But how easy is it to explain to someone you're not hallucinating, when you haven't bonded with or mourned them?