Sometimes we get a second chance at life but still feel like a failure for surviving when we were so ready to go. There'sa reason you didn't die, it is not yet your time. Don't give up until you've tried EVERYTHING. Preferably try everything 6 or 7 times just to make sure
I know it's hard when you think it's time to let go. But there is help. There is hope. If no one is taking you seriously i suggest you make a scene of some sorts to make them understand that you NEED their help. You have struggled too long on your own and you don't have to do this alone. Help is for everyone, and that includes you.
It's hard and it's painful to live. But with the right kind of help the pain can subside and the joy can return to your life. Don't downplay your pain, tell them EXACTLY how you feel and you feel so lost that you overdosed.
Sometimes we think we know others so well that we can't imagine how much they struggle beacsue they are so good at hiding it. Stop hiding it, stop trying to protect the people who can help you. Open up. Ask for help. That is the first step to a much better life.
*hugs you*