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

Me and gf have been dating for 3 years, and have lived together for 2 months now. A lot of the time, things are great. If I do what makes her happy, she usually shows me love and keeps me happy too. The problem occurs when I make a mistake. That's when she starts doing small vindictive things. 

Vindictive List:
* She'll make dinner and not tell me/bring me any (normally she would, and I ALWAYS bring her food if I've prepared some).

* She'll come home and say absolutely nothing to me. Even if I greet her and try to talk to her, she'll pretend I'm just not there.

* She'll sit there and brood quietly. If I ask her what's wrong, she won't tell me. (I've also tried rephrasing this to 'tell me what's on your mind'. Still nothing)

* She hates being late for her plans, but if we're late for any of my plans because she was slow to get ready, she doesn't empathize one bit. (Sometimes I feel like she's purposefully wasting time).

Basically if I'm upset, I believe that no matter what, I should show her love, because I love her no matter what! And I do show her love! But if she's upset... The world is now crumbling apart because I didn't wash the dishes or because I don't want to snuggle at the moment.
<bot>: Girlfriend only shows that she loves me if I am being the ideal boyfriend, otherwise she is miserable and will not reciprocate. How do I tell her this, and should I waste my time.