I'm thinking of the only thing keeping me from staring down a train is the thought that it might hurt.
Why do you want to hurt yourself? Is this something you can't go through life?
I want to hurt myself because I can't stop memories of my ex.
It's understandable that you are hurt about a breakup, that feeling is normal. However, you should start to focus on yourself as a person and your goals. If you are considering suicide, reach out to a support group or someone you trust in order to get pass these negative feelings.
I'm a worthless individual who will never have the things he wants.
Meet new people to stop thinking about her. We go bad things in life so we can learn. The more we learn, the more we can grow up and it becomes easier in the future.