Like Confucius said "Everything has beauty, but not everyone sees it"
When you are up, starting a work week might say for most of us Monday, the feeling of wanted to be back on Friday night its to much. Sadly we can go back.
There are things like debts, responsibilities, studies, work, that we have to deal with it in a different way, be positive, you can't change your work right now because.. or you can't refuse the idea of taking a test... or been a parent...
We have to focus in those things that make us feel tired, stress in different positive ways.
Like thinking in the future, forget the past, and live the present.
Everything, even if you have a thousand problems, everything has 3 solutions the one that we want, the negative and the good one. Please try to enjoy looking for a solution in the mean time enjoy your life, nobody but you can do that.