How do you deal with growing up?

I am pretty young, so maybe many of my views are dumb and skewed. I am at that point where I am supposed to find a college and choose what to do with my life. However I am struggling with how to grow up in general. I am currently studying, working, and still trying to squeeze working out when I can. I am constantly busy and I do not have a single day where I can just stay home all day or anything like that. Maybe this is just how life is supposed to be. Maybe I am just weak and spoiled and I should not be feeling bad about this. But I feel like I do not do anything I like. I am hoping at some point things will get better, and that being a teen just sucks. But will things really get better? I am stressed out about my future, and on top of that I have to manage my time to perform well on school and also work. It makes think and wonder, “ will life always be this?”. What is the point if my life will always be about being busy nonstop. All I can do is hope that things will get better as I grow up, but even that is not guaranteed. How did you deal with growing up?