Losing a Friend

My most cherished friend in the world is getting married next week. I am so happy that she has found that special someone to spend the rest of her life with, but on the other hand, it makes me sad. I feel like I am losing my friend. All of the good times we have had over the last couple years are merely good memories now. It will never be the same again. What do you do when this happens? Do you find another hobby to fill that void? Sit and ponder the good times? Consume numerous cartons of ice cream while watching out favorite movie? I am being completely over-dramatic about this. It's just hard to know where to go without your best friend at your side whenever you need them. I just feel lost.