I don't have any advice apart from making sure you let yourself grieve - it's perfectly natural to be jealous of other women who were due around the same time, don't force yourself to do what you think others think you should do, KWIM?

As for your friend, I would say that you're right, she probably has no idea what to do or say. Perhaps you could send her an email, saying that you understand that she doesn't know what to do at the moment, but you would be very grateful if she would come over for a cuppa one day and just listen?

I'm so sorry for your loss hun