I've decided that I want to give up.
Is there a reason you feel like you want to give up?
I'm so depressed and I don't see the point of living.
I beg you to persevere though what you're currently experiencing. There are people who are available to help and support you, from counselors and professionals to your family and friends. I encourage you to ask for help.
I don't think I want to do that.
I understand that you don't want to as depression is exhausting and dark, but you shouldn't give up on things. Once you speak to someone you'll see that you're not alone in this.