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When choosing your college major look at the things you love to do, research career offer in your passion, try to volunteer in at companies that offer those position, and ask your self self I do this for a living for the rest of my life, and research majors in that career field. When you find the career that you can eat sleep and breathe with no problems, you have found your passion and you career. Remember when you doing what you love it do not feel like work :-)
Don't worry not everyone knows what they want to be when they grow up. I myself, didn't figure it out til my Junior year in college. My advice, is to take classes in different fields such as business, social sciences, science, literature, art, etc, to see what interests you. See what you're good at and what you're interested in and turn that into a career. If you're interested in a certain field, try looking for a part time job in that field. You won't know what you like, til you experience it.
Good luck !