Growing up is important but I do agree that you shouldn't lose the child-like innocence that you had when you were younger. It can be hard to hold onto when everything is changing around you like for instance in my life I have lots of friends pursuing different opportunities to go to different schools for the profession that they choose. Getting girlfriends/boyfriends is really awesome and working and making money is another great thing about growing up. Starting families of our own is something to also look forward to.
Oh and sorry for getting so off-topic. Haha
Welcome to the forum RainbowTwist, glad you could make it and I hope you have a pleasant experience.
I have no idea why he said that tbh. You don't seem the type that would get banned so don't worry about it.