This is the case with everyone, even non stutterers. There’s a very small of percentage that aren’t affected by social situations, people that can absolutely say whatever in any scenario, make a complete fool of thesmselves if they really wanted to. This is something people can be naturally better at, but easily learned as well. A good tip to help right away, is right before or during a conversation, it sounds cliche, but really just take a breath, and remind yourself to not get worked up, what you are doing or saying doesn’t need this much emotion brewing inside you(negative or positive). Any scenario really is 10x smaller in reality than in your head, usually the fact I caught myself in the act of getting worked up is enough to atleast joke about it in my head and I calm down. As for the long run, it seems boring, but you have to constantly remind yourself not to get to high in emotions or low in emotions, keep chipping away at being able to obtain that same calm you feel when you’re by yourself as much as possible. Extra: if you’re feeling overwhelming negative emotions: gain inner genuine confidence, you can’t think the person in front of you is better or that you’re trying to impress them. Life long journey for some, but again chip away at your insecurities. And don’t fall apart when you stutter in public, everyone stutters, especially non stutterers, just shake it off and try again. If it’s overwhelming positive emotions (being excited to talk to a family member, telling a funny story to a friend): This is where practicing your convos to yourself come in handy, practice your control of excitement and anticipation, even summarize or break down your story, (idk, I do it a lot when I’m bored tbh). And it goes right back to the first thing I said, once you catch yourself in the middle of the act of getting too excited before or during a convo, it’s easier to snap out of it and get back to a laid back state