I too was once extremely suicidal after becoming fed up by constant trouble, pain, others' pain to me, and lack of hope. I had set a date and thought of several ways that I was going to kill myself. I had lost faith as well, so when others told me that I shouldn't do that if I believed in God. Contradicting enough, the person that told me that he didn't have much faith in God. That wasn't much help at all.
Telling a suicidal person that, "Consider how blessed you are", "There are others' worse off that you", "Walk a mile in that person's shoes" doesn't help either since all they can see and feel is how horrible and cursed they feel. I can relate to how you feel but I, myself cannot entirely say that I completely understand since I have not walked a mile in your shoes. And if I did, I'm sure I would feel your pain.
I became so pessimistic that I believed nothing good was EVER going to happen to me or change. As much as it hurts and can drive you crazy. Be patient. Blessings and miracle do come along. Like I said, I was so pessimistic that the blessings that have came my way confused me at first. Since I never believed that saying "After a storm, there's a rainbow". It is true and all my blessings, never would I have thought would happen. Don't lose faith. What you pray and wish for, keep on praying! But remember, God can dream a bigger dream than you can ever imagine for yourself! Your body is a temple for your soul, in which we were given to learn from and use to help us to become close to God. Your soul is not yet finished with it's business, please don't end it thinking that it will free you. The greatest peace that you can give your soul is finding out what happiness, love, acceptance, and who God&Jesus are to you. Then you will be free.
I will keep you in my prayers. Bless you.