Let me tell you something that both my wife and I ended up feeling very frustrated by after graduating college.
A college degree is NOT a guarantee of success. You will not fall into success simply by getting one. What it can do is open trails for you that you might want to take. Quite simply, it isnt the best choice for everyone and the path they want to take. I graduated with a BS in Materials Science Engineering and couldnt find a job for over a year (and when I did, it was 20% below the usual starting wage for my degree, now after three years I am finally moving into a job I really feel great about (I get to be an engineer, mess with cars, and get paid well for it!). My wife graduated with a Masters in Public History and after graduating she worked at Starbucks, then as a $12/hr recruiter for a door to door place that tried to scam her, then a $12/hour temp, then a $15/hr recruiter for a good company (computer security), and only now has a job as an admin(think secretary, but I might get murdered if I said that word to her ) that pays commensurate with her degree over three years later with lots of hard work to get there. What I am trying to say is, never think it is an easy path or the only path. I would still do it if I had it to do over again, but I was determined that it was the path I wanted.
YOU have to work out what path YOU want to take and you have to decide how hard of a path you are willing to walk. I did lowsy in highschool, I had bad things going on at home, but cars tied my world together and I became determined to be an engineer despite bad grades and problems staying focused. I even had a step father who kept telling me that I wouldnt ever do more than flip burgers. Wasn't easy, but I did it. You can too if its what you want, just make sure you carry the determination.
Do some research on the things Mike Rowe has to say about jobs and careers. The system does make you think a degree is a necessity for success, its not entirely true, but it does help you on a great many pathways and there are doors that wont open without it. The bigger thing is deciding what you want to do and building the determination to go out and DO IT.
Find your passion, the one that you will strive for no matter what other people think of it. Find what you need to do to get somewhere with it, if it needs a degree, go make it happen, if it really doesn't, well, you get where I am going.
Yeah, your life is gonna change, everyone's does at your age. You have to redefine your life into your own life and all of the responsibilities that it carries with it. It isnt easy, but not much truly worthwhile is. Gear yourself up for the fight, because the fight in you dictates your life from that point on.