When I'm truly happy, relaxed or so passionate about the thing I'm talking about my stutter totally goes away. Is anyone else like this and do you have any tips on how to stop at all if this is the case?

When I'm truly happy, relaxed or so passionate about the thing I'm talking about my stutter totally goes away. Is anyone else like this and do you have any tips on how to stop at all if this is the case? Does that also mean mine is less severe and can be cured if when truly relaxed I don't stutter at all? For context I started stuttering at about 9 but at 12-13 it got a lot more severe and it's probably genetical because many people in my family stutter. Edit: And I never stutter when I'm alone