Turning 18 and feel like I'm losing my youth

I will be 18 soon and when I think about it I feel like I am losing my youth. I mean I am still in highschool and I think about college issues a lot. I really enjoy being a teenager and I feel like that is coming to an end. Don’t get me wrong, I’m ok with handling the responsibilities and all. Its more of the landmark

Is there a question that I am missing here?