The grief process is often a lengthy process and they need your support for months and perhaps even years. It seems to me that one of the most important things for the person who has lost a loved one needs to do is talk about it to get their feelings out. In lots of ways our society does not really encourage sharing feelings with others. Because death is an awkward topic, we want to avoid talking about it. This might leave us unprepared for my friend to openly and honestly talk about his or her feelings.
Honest communication is important.
If you are a bereaved teenager be open with yourself and cry aloud, crying releases built-up tension. Also, your friends may not know what you need. They may feel uncomfortable around you. They may not know how to help you. If you can, let them know what you need.