Not rude at all! Yes, I committed to speech therapy since the start of the year and my therapist felt happy to hear that I'm beginning to find new confidence. I owe it all thanks to him that he told me not to make other people's problems be my problems that the occasional idiot will mock but society is judgemental on so many other things; the average listener will never bring it up and will tune it out to listen to the message. It's quite obvious my tutors and uni friends are aware I stutter but they never ask me about it and left it be that it almost makes it feel normalised. If I ever have a job interview in the future I will try to be much braver and let an interviewer know in advance I stutter so that's also another helpful tip to embrace it to take off the extra added pressure that your boyfriend shouldn't force himself to be this flawless fluent speaker when it can have the opposite effect as if it's concealing a massive secret when feeling empowered and flaunting confidence through a stutter can challenge the stigma in so many ways. Here's a youtuber I found who stutters that her fiance has no issue with that it does remind me of your situation, but she's happy and there's no reason why your boyfriend can't either: https://www.youtube.com/watch?v=LsYT3YfWz2Q