I want to live as somebody else, but not as me, not with this life

"I'm thinking of ending my life almost everyday. I've been married for 9 years. My daughter will be 4 in December. I love her more than anything. My husband is sweet, and He still love me at lot. in my life. I growed up dealing with lots of hopeless situations, and family issues. I once tried to kill myself when I was 12, by injecting air into my vein with a syringe. Obviously, it was unsuccessful. It hursts too much, I ended up flushing the syrine and the needle into the toilet. I have never tell anybody until I was about twenty something. I was often make a joke about it, thinking how stupid I was then. Life doesn't get any better as I get older. Family issue, hopeless situations, financial difficulty...I guess everybody in this world has this same problem, right? It's hard, but I took them as if that how life is; I thought I was well trained to endure and overcome almost everything. I've tried my best to make things work, to have a happy family of my own. I do have a happy family, even that we're poor but we still know how to make it fun to enjoy our lives together. I don't care what my family, my friends, his family, his friends, or whoevers thinks of us, or if they ever pity us. As long as, I believe in my future, still have hopes, then that's fine.
But recently, I become weird. I'm overwhelm with my own life. I loss all my hopes, my interests. I don't want to do anything, even thing that I love the most (like traveling). Nothing can make me excited. I'm hopeless, motionless. Even if I win the lottery, it may not be excited as it s/b, I still want to die. I'm sick of my life, that's it! I was thinking of my daughter, will she be ok without me, and if my husband is a good father, will he able to take good care of her...I think they'll be fine. Almost every night, I went to bed and hoping that I wont wake up next day. I even have plans for ending my life. I want to live as somebody else, but not as me, not with this life.
What is wrong with me? What can I do? Please advise
Please forgive me for my english. "

Source: http://answers.psychcentral.com/Depression/suicidal-thought-1/