In high school all you want is your parents to back off, you want your personal space and privacy. Your parents are in charge and there is no friendship there. Your parents do their very best to raise you right and guide you down what they believe is the correct path.
For some the right path is college, and believe me, college is rough. I call my mom every day at least once a day. Whether you go to school down the street, or 800 miles away, you probably call your mom to ask her the dumbest questions. "Can you put a solo cup in the microwave?" "What temperature should I wash my laundry?" "What do I do?" Your mom becomes your best friend the day you walk onto college campus on move-in day.
In high school, you can't have a healthy friendship with your parents. You can go to them about some small things, but not everything. What you tell your mom seems to always come back to bite you in the ass. If you tell her you're fighting with your best friend, that comes back to you. If you tell her who's doing drugs and then go out with them, now you're doing it to them too.
In college everything changes, your personal space, your freedom, and your relationships with your family members. This is the next step out into the "real world." We are one step closer to being on our own, and that scares the shit out of our parents. Your mom wants you to call her, she wants to know how you're doing, she wants to know almost everything. She even want's to know when you're going to the club and when your home safe. Your mom becomes your person when you move out. You facetime her to tell her about your day, but also to see your dog. She knows everything, and she doesn't judge you for it. She tries to help you with your problems instead of scolding you, like in high school. You can tell her you got written up by night crew in the dorm because she thinks it’s funny. And when you come home on spring break, she wants to be around you and wants to do fun things with you.
She becomes your friend in college because she can. She no longer needs to guide you like she did in grade school. She can no longer hover over you, she no longer knows what you’re up to unless you tell her. Our parents have to pray they raised us to make the right decisions when they are no longer by our side, but they will be there for us regardless of our decisions.