The Red A

No, I'm not talking adultery.. But rather anxiety... I struggle with severe displaced anxiety and have for quite a few years. My boyfriend is so willing to try to understand what I go through, but if don't experience it first had I think it's really difficult to understand. How do I explain it to him to give him the best understanding I can? I've described it as a giant bowling ball that I carry around in my chest all day, every day. But that seems to be putting it lightly.. Suggestions?