Christmas spirit?

Our long (but still too short) winter break is still not over, even Christmas is still not over, but somehow I'm sad and  I've got a strange feeling of missing something intangible. I'm not in the mood of listening Christmas songs, I don't feel this joy which should accompany me these days. At the beginning I thought it was because of the tiredness, hurry, preparations or constant necessity to learn something, but later I realised that even when I have everything done, I still feel frustrated. Christmas time is said to be the time for reflexion, so I've been reflecting and I eventually came to a conclusion that it's me who is responsible for this situation. My lack of self-confidence, my self-loathing at times, the fact that I'm never satisfied with my successes; I always want something more, I want to be better, smarter, prettier, etc. 

I'm aware of the fact I'm not perfect and I will never be, but lately I've decided to change my attitude towards myself. I know it won't be easy, but at least I want to try as we have only one life and a right to be happy. It's my New Year's resolution :)