I feel a lot like you do sometimes. My mother committed suicide 1 month ago, even though I wasn't really close to her because she left when I was about 2, I still really felt it. I'm not very close with my dad, or any other family member. All I have are a few good friends, and they make it worth while. I feel like giving up a lot as well, but if it is one thing I have learned, something always manages to come along, or someone, which makes you change your thinking, but it eventually comes back, I know that. But you were put on this earth, not to give up, but to impact the world. And that's what you should do, or at least try to. Don't give up on the world.