Sorry to hear you have reached the bottom of the pit, so to speak, and that you have expressed this to people close to you and no one seems to have offered any help. Perhaps like others have said here, the people you have talked to just don't know what to say or are afraid to consider talking about it.
Do you think this is a situational depression you are in, or is it organic (brain chemicals messed up?). Or a bit of both? There was a suicide in my family in 1995. It is the hardest thing I have ever had to deal with in my life and I have been through some bad stuff including 2nd degree burns on 15% of my body after being trapped in a burning van. If you have parents, grandparents, siblings, cousins, aunts, uncles, nieces, nephews, friends, etc you have no idea how much your life impacts theirs and what a "legacy" you would be leaving in their lives forever. The person in my family that killed them self had no idea what it would do to me, the sleepless nights, the nightmares when I did sleep, the total physical collapse of my health, the time I had to be off work because of my collapse, the drugs I have had to be on ever since. Over two decades later, I can barely function on the "anniversary" date each year. And that was just me, not the closest of all the relatives. Is that the legacy you want to leave?
Often suicide is a permanent solution to a temporary problem(s). Please get professional help to untangle the web of problems that have led you to this point. If you had a severe gash and were bleeding to death, I would not try to stitch you up myself, or ask your friends to do it. I would apply pressure to the wound but I would call 911 to get you professional help ASAP to save your life. You have a "gash" in your heart and emotions right now and you are "bleeding out" and while lots of people here care about you and what you are going through I don't know that any of us can do more than apply pressure to the "wound" you need a professional to help save your life. Keep talking to us here, and we'll do our best to apply pressure but please get the help you need.
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I said, "You don't understand that I don't understand what you understand."