came in my life , I trusted her? tried to revive my life for her, she promised me that she will end up with me no matter what, she says her parents might oppose the marriage , but after marrying her husband she will leave him for me..........I believed that, but now I think she doesn't have any plans of leaving her husband after marriage and would leave me alone.........I don't know what to do?

I am going into depression and now I can't even commit suicide ( my resolve to die has weakened ) and get rid of this ugly and painful life nor I want to live live, because she was the only reason why I wanted to live, she was the hope for the beautiful life that I was looking forward too.

I am in pain and very depressed, please any kidn of help would be welcome.......if you know of any painless method to suicide please tell me that, I can't buy gun.......so any other painless suicide method please do tell me about it.