Not everyone wants to talk about it. When I had one I only spoke about it to my husband for many years. I would wait until your friend brings it up. My husband bought me a rose bush and we planted it together which was a sweet thing for him to do. It was in honor of the baby and it is growing wildy over a trellis. And we picked a star out of the sky and we named it for our baby. We often look at it and think about our baby. Because each person is different I would wait and see how it goes with your friend before bringing it up. I was very weepy and depressed for months. However since I have other children I couldn't be depressed for long.
God bless you...wiping tears from my eyes now.