Hanging on by a thread

I am tired of my life. I am tired of looking back at my past and looking into my forward. I have a feeling of complete hopeless. I have been suffering from depression for 7 years of my 20 year life. I am usually always depressed about one thing or another but sometimes my depression explodes and hurls me into a scary state of mind. I am currently in one of these states of mind. I have a ugly past and I have obscene tattoos that remind me of it daily. I wake up and wish my tattoos where gone but they are not they are still here. They serve as a haunting reminder of the horrible person that I am. I want to kill myself. That is it. I want to be dead so I no longer have to look at my past, future, tattoos, problems, any of it. The only thing that has stopped me from doing it is a puppy that I rescued not too long ago. He is the only thing that is holding me back in this world but I think that my feelings are starting to overpower even him. No one listens, no one cares, why should I?