Has anyone with depression ever felt like this before?

I'm 19 and just finished my first year in college. I've seen everyone around me do spectacularand fun things with their life like having children, getting married, traveling the world, etc at such a young age. I just feel so alone and feel like nothing amazing will happen. I am young and should be having fun, right? I want to travel the world someday but it just seems that it will happen when I'm way older. Has anyone felt like this before? What did you do to help those feelings?