How can I stop time?

Turning 18 in 2 hours HELP. I can't believe I'll have to move out & live on my own soon in the uni. The fact that I can now enter my correct birth year while signing up to apps & can use my original ID at cinema & bars is CRAZY. To think that the decisions I take will have real consequences now is HORRFYING. Well, the good thing is I grew up in an asian household with an absolute strict parents, so finally i can figure out the life my own way. But to think, I'll never be 17 again and won't ever be able to mess with buddies at the back of school classroom during lectures is SCARY. How do you get over the fact that you cannot live a past moment again? Also, I'll really appreciate hearing out some advises from y'all, would mean the world to me! 🫂🫶