LW, I'm so sorry you haven't felt comfortable sharing this huge part of your life with your boyfriend for fear he won't give you the attention and care you deserve. What an awful, shaky feeling, as if the grief itself weren't hard enough.
I truly think good listening is non-negotiable. It might even be everything.
"My left ventricle."
Oh, this is wonderful. "I’ll consider myself lucky if I don’t have to eat you when you die" is the best thing ever.