I never understood heartbreak thinking that would be a selfish love if everyone is still alive existing elsewhere as lovely as ever.
I later found we are not ourselves-- I was not myself wrapped up and folded into you seamless under blankets, only adjacent to the sofa backing and mattress.
When I decided to leave that night I felt us break as slow and ponderous as Pangea, I felt our distinctive ends begin. A part of me would not survive and I certainly killed something.