CL, I have delayed my response to you, because I don't want to come off like I know all the answers--I don't, and can't presume to know your heart. But I have been and am currently being treated for depression, and have been close to ending my life, too. Thanks to my husband and sister, I got immediate help, and discovered I can withstand and move past the pain I didn't want to deal with anymore. I've had some therapy, but mostly read pertinent books to help my healing along with medication.
I would only like to encourage you...to delay any urge. Stay with your thoughts and feelings for one more day, then the next day, commit to one more day. You don't have to solve every problem. Just focus on getting through the day. Every day.
Write on your good days; list the good things you have done and how you helped someone else. You can't solve the world's problems, but even to help one is a great victory. Having victories to look at might help you on dark days. Perhaps start a gratitude list.
You have no idea how you impact people. None of us do. We can help someone by simply smiling, or doing some random thing like saying hello....like you actually "see" them.
I see you...I can imagine you see so much pain every day and you're taking it on. It's okay ....but find a way to carry on. There are still good things to live for.

