You mustn't. Life is precious. How would your family feel? It wouldn't be fair on them to live with feeling that they could have done more. I've had four close friends and relatives end their lives and what they leave behind is a lot of pain and guilt.
I've been very close to ending my life myself several times, but I'm so pleased I never did it. Things are getting better for me now, and they will for you too. If you'd like a chat please contact me at lamposatmaildotmd. You won't feel lost with people supporting you. Even if you've no-one you know who'd help, there are people here who will. We care.