How often does baby feed?

C
I have an almost 3 week old and she has started feeding about every 2 hours at night. Is this normal? My aunt told me that I need to get her on a 4 hour schedule and that "I'm the boss", but I just don't feel good denying her the breast when she wants it. I feel she's still too young for that.
At what point do you start trying to regulate things for them??