Have you told anyone close to you this? When I admitted my suicide plans to my family, in detail- the how, where, etc, I knew they would never let me follow thru. I did this once I was thru the emmient danger of following thru but now I know if I get to that place again they know where to find me and will stop me- even if they have to involve the police. So its now no longer an option and honestly, that is a very reassuring feeling. Why even bother if you know you wont succeed.