The only person who needs to know that you accomplished that goal is you. You are the only one who is valid enough to have any kind of reaction towards your achievements in life.
You don’t want to be negatively judged or evaluated in anyone’s eyes, so you think about what you can do to make sure it doesn’t happen. Most likely your biggest trait.
If you let what you think others think control your own mindset, you are going to miss out on so many opportunities in life.
The outside world has so much to offer and experience. Go out and experience it.