Disappointment about now. Contrast between image of holiday joy and reality of ones life. Sense of increased isolation and loneliness. The holiday season is also a busier and more stressful time. We have more things to do, more things to buy, there is more traffic, parking is more difficult, stores are crowded and we wait longer.
Problem solve it.
Don't make yourself helpless and don't accept the role of a victim. There is much you can do to make it better for yourself. If your holiday blues are a manifestation of the stress from all the extra demands of the holidays, do some things to reduce the demands. Rethink how you view and approach the holidays. Also review your beliefs about what you have to do and the consequences of not doing what you believe you must do.