I only feel this way about my parents.but I'm sure the quote is about a broken heart. I'm pretty sure losing them is the only time I have had a broken heart. nothing else in my life has ever made me relate to quotes such as this
I'm not a Marine but i was attached to the first Marine Expeditionary Force, my high speed low drag MP unit was their QRF. The above passage pretty much sums up what i feel for my Marine Brothers and sisters.