It's always harder when people have relationship issues (breakups, problems, etc.) that occur around the holidays. You see all the tv ads and commericals showing happy people and you wonder why you don't feel that way and wish you could have that for yourself. A lot of that is just fantasy...kind of like the fairy tales we were told as kids.
The holidays are very difficult for me right now. So, you're not alone in feeling that way. Just know that because you feel sad today, doesn't mean that you'll feel sad forever. It's a temporary state of mind because you're hurting right now.
On the positive side, pain is a tremendous motivator to change. You have the power and control to work towards a better tomorrow by making healthier choices for you in the present. It takes a lot of work, but the time and effort spent is so well worth it.
What nice thing can you do for yourself today that maybe you haven't done in a long time? Do you even know what make you happy? Perhaps making a list of all the things you'd like to do in the coming months and doing 1 of those things each day might help you along your way.
Keep coming back and talking it out. It's helped so many of us here and it can help you too!