Sorry to hear you feel this way, i've been there myself. I'm 34m , and my ive learned how to get my speech under control , but I still stutter everyday and get stuck bad sometimes. Don't give up on yourself and just know you can make things happen, it'll just take a little extra work. I DONT suggest you do this, but what helped me stop many people from making fun of me in school was defending myself. If you bust someone in the mouth, it's makes them really second guess messing with you. Like I said, I DONT suggest you do this, if you can talk to them and explain what's going on or turn it into a joke, it might make school life easier.