In response to tarni, perhaps i'm naiive but i'd like to think most relationship aren't begun with an end in site. you love and marry and have children because of the idea of being together forever, and making your partner happy and vice versa. In the event that forever gets cut short, you take what that relationship has taught you and you use it for your next forever. one thing to remember is that forever isn't always a measure of only time, but also of the emotional and spiritual influence you impose upon another, that will always be with somebody even if you're not.
it's just like losing a loved one, they may have passed away, but as long as you live they are in you're heart, and that is forever, so cheer up.