This includes your professors - they don't bite. As basic as this sounds, this affects a lot of students. That kind of behavior almost always negatively impacts your education and grades. Make your attendence a habit. SDSU is a large campus and enrolls in excess of 30,000 students.
Many students commute and everyone is busy.
In that kind of environment it's easy to become isolated and lose contact with others. Make a concerted effort to talk to your peers. Study groups are a great way to imporve your grades, enhance your education, and guard against isolation. Volunteering, community service, and part-time work are good ways to enhance your academic experience. Use your campus resources SDSU offers a number of sources for researching potential majors.