Will mycobacterium tuberculosis infection kill me if i don't get treatment?

Possible over time: Tb is a huge cause of death... More than half a million deaths worldwide...Usually these patients are not treated or diagnosed late. Typically TB from the lung causes many complications and can spread to other organs and cause death after a long period of sickness.

Yes: And you will hurt everyone you love and live with by infecting them as well. In many countries you don't get to decide. You either take the treatment voluntarily or you get detained and kept in isolation. This applies to open tuberculosis. If you have latent tuberculosis, it's a different story. Chances of death from latent TB are almost zero, unless it turns into the open form.