Man, I was you when I was in high school. I thought I would stutter uncontrollably for the rest of my life. Now, I'm probably going to stutter for the rest of my life, but it's improved dramatically since I started seeing a speech therapist to learn exercises and techniques to help and a regular therapist to talk about it and the issues it caused me socially. I strongly recommend you seek out help in getting it under control. It's very much possible to stutter with confidence if you can get it relatively under control. Pm me if you want to talk.