I know this isn’t easy for everyone, hell it was hard for me, but you have to just suck it up and talk. My stutter has improved drastically through highschool and now a lot more now that I’m in college. The act of always talking is what has helped me a ton. I went from being unable to finish any sentence, to annoying the shit out of people because I won’t shut up! I highly advise you looking into Greek life if your college has it. You are forced to talk and get out of your comfort zone all the time during pledgeship. One of the greatest decisions I ever made in college.