passing time

Okay am I the only one so scared of the time passing? I mean I know I'm not the only one, don't worry I'm not that delusional. But still, god why is it so cary actually? I'm 19 now but in few months I will be 20. FUCKING 20. And dont get me wrong, it's still young age I know that. But there is still the feeling of a lot of things never coming back. Even tho i was a depressed fuck in my elementary school and also in high school, i still miss the vibe of just not caring about my life. I miss sitting on wattpad for 5 hours with my friend, I miss spending whole day outside doing literally nothing and thinking about the next day, nothing longer than that. I miss a lot of things that will never come back just because life is different now. And it will always be different. It's scary.