I feel for this SO MUCH. I attempted suicide once, (by overdose, I just made myself sick and played it off like it was food poisoning), and have considered it seriously countless times.
My great-great-something committed suicide long before my mom was born, but the story of the end of her life left a lasting impression on me that I like to share with others in the same situation. She decided one day "if I still want to end my life 5 years from my next birthday, I will do it." Remember, this was long before cell phones where you could set a reminder on an exact day. She remembered 5 years later, and unfortunately followed through.
BUT. Because of her persistence in that "5 years from now" thing, it's kept me going during my darkest times and stopped me from trying again out of sheer desperation. I've always thought "if I want to seriously do this, I'll still want to 5 years from now. In the meantime, I'll just float through life and figure shit out."
She also quit smoking the same way. She promised herself that she would only light a cigarette on the hour, and if she missed it, she would have to wait another hour for the next one. Eventually, she kept missing "smoke time" often enough that she stopped thinking about it.
The woman was strong. And she still decided to end her life. I wish every day that I could have met her. Maybe in the afterlife. We'll see, someday. Maybe. Who knows though, right?
Also, side note: when I was a teenager, I made a suicide pact with my best friend that if we hit 35 and neither of us were married or had kids, we'd do a double suicide. BUT. It all went to shit when she had a kid and I became his godmother. That kinda keeps me going sometimes.