I really just think being there for her is the best advice. Just letting her cry on you when she wants and back off when she wants. If you want to get her something nice try looking on
www.alexandrasangelgifts.co.uk/ there are some lovely things on there.
I think the nicest thing someone did for me was buy me a little angel and attached a really nice card to it. The card read something like "This angel has come to protect you and help you through these hard times." I can't remember exactly as I haven't read the card in a while but the angel figure sits on my mantle piece.
Hope this helps x