I'm tired of my life
I am sorry you are feeling like this. Why are you tired of your life?
I feel tired of doing things. All I do is work. Why can't I allow myself a bit of fun?
It's okay to want to have fun. If you're unhappy and tired of your life, you should make changes. If not, you're only going to get depressed by doing the same things that don't excite you.
Maybe. I have to think about it.
I am glad you will think about it. It is normal and expected to live your life in a way that you are a happy person.