I feel so sad for them, I hate that I know what it feels like to lose a child.
Did your friends lose a child too? I'm sorry that you share such a sad connection with them.
It's heartbreaking to have to experience the loss of a child, my life feel so empty.
It's understandable to feel negative feelings over a bad situation you've experienced. Try to talk to someone about it so that you can put it behind you and move on.
Talking to people doesn't help, you can't understand what this pain is like.
I can't imagine the loss you've experienced. I think you should join a support group for people that share your experience. Talking to others could be very helpful for processing your grief.