As a college student (20 M) with no real friends with whom I can share my feelings and on which I can trust, my faith in real relationship is decreasing. Is everyone in this world is so selfish.

Even with my career in place, I feel lost. I don't know what should I do. From my childhood people have been asking me are you depressed, but I never thought much about that. But after thinking, I think I was and am depressed. I rarely feel happy. My sadness can also be contributed to my parents fighting at a regular interval.
I don't have a will to continue with my life but can't kill myself as I am too scared. What the fuck should I do. I don't have any aim in my life except my career. I don't to work for me only. I can't build any real relationship and everyone I interact with is selfish or is not interested.