Could be because of your social life, could be because of social issues, your work, anything.
There's a quick way to help ease things:
Just one small thing that will make a positive difference. Get that one thing done.
It may be small... but it's still proof that you can make things happen.
Plus: it's amazing how much clutter can wear on you without your realizing it.
And sometimes that's all you need to keep going.