You will outgrow it over time; you just need to put in efforts, such as working on yourself, for example, speech phase, breath control, and anxiety control. As the years pass by, you’ll realize you have minimized your stutter, and now it is not noticeable. Maybe you won’t ever outgrow it 100%, but it will be minimized for sure. I’m 24 right now, and I had a severe stutter growing up, but by applying this approach, I have outgrown my stutter and made it unnoticeable with practice. You are 13, and I’m very sure small efforts every day will create a huge impact when you’ll be an adult. When I used to get stuck, I used to just pause, take a mild breath, and continue the sentence. You will figure out how to outgrow your stutter once you put in efforts to stop it."