When I was 17 I was also thinking that I will die before my 25th Birthday so I dont need to suffer anymore. But then I found a good speech therapy that changed my life. After few years I stuttered again (present time) but luckily I found even better therapy that will beat the stutter forever (thats the plan). So that should be the plan Nr. 1. Do a research what therapies are there in your country. And also maybe try to going some stuttering comunity irl. Or something. You dont need to suffer and you dont need to kill yourself. Dont forget it B-) And yeah, if you got teased (like me), then go to the gym, get muscles (like me) and nobody will mock you again (like me). And if they will, you can punch their face. Problem solved, happy life.