Help me get over my sadness?

I become sad at Christmas or my birthday. They have nearly half a year between them. So when Christmas comes, I become sad, because I know, when its o

I become sad at Christmas or my birthday. They have nearly half a year between them. So when Christmas comes, I become sad, because I know, when it's over I have to go to school again for a long time. And when I have free time I usually play computer games, because I'm bored. Then I also become sad, because I think, this is the time I should do something fun, something I like, because, as I just said, holidays dont occur very often. I'm not always able to do the things I want (season, time etc.). So I'm often just stuck sitting at a computer.
Could you suggest anything, have you ever been through something like this?
Thanks

or:I become sad at Christmas or my birthday. They have nearly half a year between them. So when Christmas comes, I become sad, because I know, when it's over I have to go to school again for a long time. And when I have free time I usually play computer games, because I'm bored. Then I also become sad, because I think, this is the time I should do something fun, something I like, because, as I just said, holidays dont occur very often. I'm not always able to do the things I want (season, time etc.). So I'm often just stuck sitting at a computer.Could you suggest anything, have you ever been through something like this?Thanks

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