I'm suicidal. please help me out.
Well here I am reading this half a day later. I certainly hope you're still there.
You posted this in the General Science subforum, which isn't the best place. You would probably get more action in Human Science (which includes psychology) or Ethics. Even in Free Thoughts, although you would have to put up with a lot of smart-ass answers. I'm tempted to suggest that one of your problems is that you don't follow directions, but then that would be a smart-ass answer.
It's hard to advise someone who says they're suicidal. For one thing it's risky, you might just say the absolutely wrongest possible thing without realizing it. For another, it's not a generic condition like the flu, so there are no one-size-fits-all remedies.
As a process improvement consultant, I would suggest that you deconstruct this into a process and work it one step at a time. The first step is to get yourself to feel better
right now. If you use any recreational drugs, stop. That includes caffeine, I'm one of many people for whom it's a dangerous drug and you might be one too. If your doctor has given you any prescription drugs to help with a problem like insomnia or depression, make sure you take those. If you don't trust your doctor then do whatever you have to do to get a new one.
If you're not getting half an hour of solar-spectrum light on your face and a little other bare skin every day, you could have what goes by various names such as "cabin fever." You have a physical need for a little real or artificial sunlight to recalibrate your circadian rhythm every day, since for unknown reasons we're wired for a 25-hour day, not 24. And you have a psychological, emotional need for it as well. We're not tunneling moles and we're not night-hunting panthers; deep in our animal brain there is an instinctive need to see the sun every day. These days it's easy to buy solar spectrum compact fluorescent light bulbs to screw into the sockets in your lamps. They may cost a few bucks each but this is your life we're talking about.
Do you get enough exercise? That's a no-brainer.
Avoid being alone. Even the most curmudgeonly of us is a pack-social creature by instinct, and can't help feeling somewhat more at peace in the company of family, friends, or even friendly strangers he can talk with. Who knows, one of them, facing you in person, might be able to offer better advice than we can based on a few words of writing. But even if not, the company will both distract you from what's bothering you and release some endorphins that will elevate your mood.
If you have a dog, put down your mouse and go grab him immediately and hug him. Dogs have been comforting us for 15,000 years. You might say they're the only true religion because without even promising to make us feel better, they do it. If you don't have a dog, then go out and get one. No depressed human being should be alone without a dog. I can't tell you the number of times my dogs have sensed my feelings and come up and commandeered my attention. They reminded me that there is somebody who really cares about me and would miss me terribly if I weren't there any more. And snuggling with them releases endorphins.
So: pour your coffee down the drain, go for a walk in the sunlight with your dog, and meet some nice people along the way. That covers just about all of my points.
Work on just taking care of right now, today. When you make some progress on that, then start figuring out what to do about the future.
I do not in any way mean to belittle all of the thoughtful things you articulated about your goals, people, the universe, and everything else. All I can say is that out of the ten or twelve billion people who have inhabited this planet, you're not the only one who has been bothered by those things. Not everybody is content to let their mind be occupied by the Home Shopping Network. There is a large number of people right here on SciForums who rail about these issues every day, often more than once a day. But they find a way not only to not let it drive them to suicide, but to actually be energized and go back out into the world and do their teeny little part to try to make things better for at least one person, perhaps themselves.
See if you can't find a way to just feel a little better temporarily, and from a new perspective you might discover that you can reevaluate your options tomorrow.
Good luck. Keep in touch. We care.