Struggles after graduating high school

Most of the people I've seen on this site so far have been younger than me so I'm not sure how well this will resonate with others. But I've been struggling so much with the fact that I'm aging which sounds ridiculous. I'm turning 19 this year and I don't miss high school or anything (my experience was pretty boring) but I feel like everything in my life has been moving at such a rapid pace and I still have no clue what I want to do with my life. I know these feelings are normal for people my age and I shouldn't worry too much about it but it's still such a weird feeling. 

I just started my second semester of my first year of college and I just feel like I'm still a little kid who has no idea what I want to do with my life. I've been dealing with a lot of depressive thoughts since I was a kid, and I have a lot of anxiety which I believe worsens these feelings. I still feel like I'm a 13-year-old and not the adult that I am in reality. All of my friends from high school and the people I interact with in college seem to have their lives figured out (or they at least act as though they do) which just makes me feel even more helpless and lost. 

I know these feelings are normal and are part of what life is like after graduating high school and in the future this will all seem silly for me to get so anxious about. In the moment though I just feel so stuck in life and like I'm just a dumb little kid.