You must be feeling horribly helpless. I know what you are going through as my best friend's son tragically committed suicide last January, whilst at university. It was 2 weeks br=efore his 20th birthday, and nobody had a clue he was depressed.
I watched my friend fall completely apart, not helped by the fact that she was currently going through a rotten divorce. I remember that she was numb, and got through to the funeral on autopilot. What a tragic day that was. But she held it together that day.
Afterwards she completely went to pieces, not helped by the fact that she simply couldn't sleep, which I think is common in bereaved people. She literally spent hours crying, clinging on to his clothes and things. Then she would be furiously, dementedly angry, shrieking rage.
As a friend I felt completely useless, I couldn't help with the practical things such as cooking and cleaning, as that was almost her salvation, she would dash around frantically to keep her mind busy. She also went back to work ridiculously quickly, 4 weeks after his death, but she said she needed to. I think it helped actually, got her out of the house.
After about 6 weeks she really started to feel that she couldn't go on, nothing was getting better. She then started to go to bereavement counselling (offered by Cruse) and it has been an absolute godsend, I cannot speak highly enough of them. She still goes once a week, nearly a year later.
The only advice I can give is to just be there, on the end of the phone, for a cuddle, as much as you can (which you obviously will be . And to listen to her, if she needs to. And don;t be afraid of talking about her husband, my friend said that the mark of real close friendships as opposed to more casual friends is that the real friends are not afraid to talk aboiut the person who has died, that they were important and their lives impacted other people. The more casual friends are almost afraid to mention the name.
Another time that she found hard was around 6 months, she felt that the majority of people would have expected to to move on to a degree. However, the grief is still the main part of hr life at the moment; she is achieving what you could call a 'normal' life, and my god we go out together and scream with laughter, she is my wonderful best friend who is the funniest person I know. However, the dreadful sorrow is still very much there, she can start to be very upset and cry anywhere, it is still so raw.
I can never understand what she has gone through (the thought of losing my dd makes my blood run cold), but I would like to think that I have been there fore her and have supported her the best I can. That's all the advice I can give, really, listen o her, be there for her, and remember, and talk about, the happy times she had with her husband.
Blimey, epic post!