<human>: Can you give me the gist of the text in a nutshell?

I am a freshman in college, and have gotten close with a girl that lives one door down from me. We are both coming out of serious 2+ year relationships from HS. I have made it 100% clear that I don't want to jump into a relationship, she was fine with that, as long as I'm open to a "progression of our relationship" because she is NOT interested in being FWB. So we kiss a lot call each other babe, we've fucked, etc, looks like a relationship. The main reason I didn't want this to become a serious relationship is I am tired of being responsible for the another person, in the respect that I need to check in, communicate where I'm at, who I'm with, I can't spend the night somewhere else without getting bitched at, etc. 
She feels I spend to much time focused on other things (I'm pledging into a fraternity, there's lots of required events I go to on the weekends) and that I only hang out on week nights with her since it's "easy", because we are neighbors. Note: I'm not fucking other people, I just want to able to go to a party when I want to, without knowing I will be given silent treatment and have to beg for forgiveness the next day. There have been a couple instances where I'll say "let's get coffee at x time" and then missed it because of obligations, so I believe this is adding to her aggregation.

My questions: am I being selfish? Is she asking too much? Thoughts?

I'm happy to respond to questions for clarification or anything like that, I'm not good with relationships :/
<bot>: neighbor wants to date, I want to take it slow, she agrees but simultaneously bitches because we're taking it slow