Jilli-Sorry to hear you are down in the dumps at this time of year. Some things I would suggest that may lift your spirits, especially if you have some free time on your hands....volunteer at a homeless shelter, abused women's or a child protective shelter, heck even a retirement home. I've done this a few times and I guarantee that no matter how bad you might feel, somehow this lifts you up (especially to know that not only are you helping someone else in need, but it brings things into perspective in your own life somehow). Even it is something as simple as spending an hour talking to someone that doesn't have a family, it makes a huge difference in their lives as well as your own.
Good luck! Just know you have a FORT family to come to as well!