I lost my creativity

I feel like I lost my creativity. Tiil 11. I used to be so creative and smart in my own little way, but as I grew up I feel like slowly I lost my ability of making up fun things, games, having hobbies and drawing/painting…i can be creative sometimes but most of the times I’m uncreative as hell. sure I still have a few hobbies now and WANT to do so many more things but sometimes I’m so uncreative and unoriginal it pisses me off. it isn’t like I JUUUST grew up and stopped being interested in playing or wanting toys. No, it’s way different then that. If you get me. Why do you think this happened?