I am so tired. How can i fix it?

I am so tired. How can i fix it? I am so tired of stuttering. I am a 17-year-old male, and I stutter a good amount. I have tried to fix it many times; while it is possible, it feels very hard to do. For instance, if I am in an environment where everyone becomes silent when someone talks, I do not stutter at all because I can control it. For example, I talked with my friend in a silent environment for 30 minutes, and by using the tips my speech-language pathologist gave me, I didn't stutter for the entire 30 minutes. However, in a mixed environment, it happens frequently—outside as well. I think it has to do with noise entering my brain and causing my brain to stutter. I saw many girls are being attracted to me (until they know that i stutter); truly, I can mix humor and seriousness well, I am relatively smart, and I can score an 8.5 on the IELTS reading and listening sections, etc. I am disciplined; for example, I force myself to sleep naturally, I do not watch porn, and I only "climax" using my imagination. But stuttering causes a big problem, so I can't focus on others due to demotivation. Every day that I return from a social place, I feel guilty because of my stutter. I want to hear your words too. What do you think? And how can I fix it?