Counseling could be one way of coping with this loss and trying to fill this void in ones life. Anti-depressants is another alternative. The best way I have found to beat the blues in combination of the above,if that is needed, is to bring yourself back to something you love to do. Be it listening to music, writing memoirs, singing, going out to a comedy. Just get yourself involved and loose yourself in your favorite past time to help alleviate the pressure.
Remember not everyone is happy during the holidays. Try and look out for one another. You never know; all that person really needs to know is that someone has noticed them and had shown them that they really care. It is not only the teenagers we need to watch. We also need to watch the people that fall within the middle age group.
So during the holiday fun and cheer look around to notice others that are not so happy. Cheer them up and show them that you care.