Losing someone to suicide sucks. I’m willing to bet there is at least one person in your life who would be sad (or perhaps devastated) if you suddenly died. Even if it means continuing on while unhappy, don’t put that person through such an ordeal.
Depression is a temporary condition. It feels like it’ll last forever and that life can never go back to the way it was, but that’s not true. It might change you, and that change might be for the worse, but you can escape it. You can. It’s hard, but it’ll be worth once you’re on the other side.
Start by seeking professional help. There are affordable (and, depending on your area, perhaps free) options out there. Then, change how your mind thinks. Don’t let those thoughts rule you. Fight them! You can do it!
The fact that you immediately jumped to depression seems like you didn’t even think about the question.
There is literally no reason to live, we’ve made that all up. That’s not depression, that’s reality. Pushing fundamental questions into a pathological corner is condescending.
Call me crazy, but typically when someone asks for reasons to not kill themselves, depression is involved. Maybe OP was just starting conversation, but given the question and the increasing rate of people struggling with depression, I thought I’d offer my thoughts. I don’t believe this answer was condescending.
If you take your own life, things will never get better. It’s not going to be all sunshine and rainbows if you don’t, but it can get better. Ending your life removes all possibility of any good thing ever happening. But you’ll never find out if you’re not here to see it.
It’s a dark take to have, but it’s just not worth it to cut the wire here. It can be hard, and things may seem bleak, but as long as you’re still here, there’s still a chance for life to get better, it often does, and it’s a chance worth fighting for.
It’s easy to be caught in the here and now, but you can’t predict the future even if it feels like it. Take the time you’ve been given and use it. All ending your life will do is end the chance for better things.
The other thing is it’s not a release. Religion or not, whatever your beliefs, there’s no sudden wave of freedom, or drop of stress. Overwhelmingly reports of someone who attempted or was brought back end with them regretting it or not wanting to give up at the last second.
Life is precious, not because it’s good or because there’s some holy significance to it, but because you only get to do it once. You can fall in love again, find friends again, join communities, see the sun, help the world, help your neighbors, play video games, whatever. You can always do those again.
But you only get to live this life one time. Fill out that story until you run out of pages. Don’t leave the book half finished. If you’re alive, there’s hope.