The knowledge that I have to go to work for the rest of my life. Other people get to live remarkable lives, and I don’t. This is it. Forever.

Alot of the serious things that people here already mentioned, unable to see a bright future for humanity. Cant afford a house of your own, etc.

But another thing that affects me day to day is Seeing stray cats and dogs on the side of the road. They just make me sad and then i have the urge to help them. And then realizing that i cannot help them all.