I suffered from depression when I was 19, and it was a tough time. Even though I consulted a doctor and received treatment, getting back into my regular life was difficult. Moreover, suicidal thoughts occurred to me more often, so I began to rethink my life and my place in this world. If you also think that your life has no sense, look around. Look at what happens around you: people will soon get to Mars, explore other planets in our universe, invent electric cars, treat diseases, etc. You have to live and see it all.