Life can be tiring but it only does when you rely on yourself to survive. Often we forget that our lives are controlled by God who knows everything about us, even things that have not happened to us yet. Trust me, God is beyond human comprehension to understand and this is why in Deutoronomy 29:29 God says we should worry about the secrete things we don't understand.
That as it is, some people tend to give up and declare their tiredness on pursuing life. Don't you do that becuase you are inviting the devil to impress that feeling on you even more. His ultimate is to get you physically dead, burried and done away with.
All you must do is pray to God through the name of Jesus Christ for help to overcome your temporary situation.