Perhaps you should enlist in the military. It could be a win/win. On the one hand, you might get killed (and go out a hero rather than a suicide). On the other, putting yourself in harms way might just help you realize that you want to live after all.
Regarding the legal status of suicide, the fact that estimates of what percent of suicides are mentally ill varies between 5% and 95% affects the legal status. If a person is suffering from a mental illness, should we let them commit the irreversible act of suicide if we can do something to prevent it? On the other hand, if they are suffering from some terminal illness, suicide may well be the most logical option.