Hey i used to be just like you, then i realized, everything has a time and place. When the moment comes for something to happen, you’ll know it. And I WAS LITERALLY THINKING EVERY SINGLE BULLET POINT LIKE YOU DID. But then i realized, “I don’t have to be embrasssed of something i can’t control”. And im pretty sure im your age too, but i have this saying, “Not everything is black and white, but multiple shades of gray” meaning, every good thing has something bad happening in it, and something bad has something good in it (Maybe if you didnt stutter yu would be a douche, idk). I know man, it really fucking blows, just keep your head held high. And imo for college, if the professor ever tells you to talk about yourself or if anyone wants to talk to you, get the fuck up, and own your stutter. I would respect the hell out of anyone who did that. Being out front means that people know what to expect and you dont have to be as worried talking to people. And with college, you have a CLEAN SLATE. Good luck man.