God, that must be the worst thing in the world, losing a child. I can't even begin, or want to begin, to imagine how horrible that must be. Your friend needs your strength right now, good to see you are there.
I just ran into a man I worked with today and he told me his wife died on Valentines Day. He was almost in tears telling me how he is trying to cope, so I slipped him my phone number and told him if he feels like it I would love to have a beer with him. Sometimes you just need someone to listen.
Don