We don't take a required attendance in my University, but some classes that are smaller and meet only once a week do, in which you will fail the class with a number of absences. Other than that, its really up to our discretion whether to come or not.
I usually skipped management 3004 since Schander (our professor) teaches completely from the book and his 'quizzes' are easy to ace as long as you read the chapter. So just show up for quiz days. Finance on the other hand...I had to go every class since in-class exercises were the only way I could understand the material.
Depending on what University you attend, and how large your classes are, the college professors aren't any more likable than your high school teachers. Believe me. You won't get to really like a teacher until your junior/senior years at my college - it's huge and classes are too big for the professor to really know who is in her/his class.
And no friends in college? Then why bother enrolling? Just stay on RO and werk on that forsaken elite degree. LMAO. Yeah...