Once I started puberty around grade 8, something flipped in me and I became mega self conscious about my stutter. I definitely drifted down the popularity ranks and avoided people and class more. Started skipping classes where I had to speak and not doing homework so it meant I didn't have to answer questions. It was hell. But I had sports or other things that made me proud too. Go all in on those. I do not recommend speech therapy unless the stutterer himself is asking for it.