No talking for a week (and counting) after fight

Had the weirdest fight with my S.O., I've been annoyed with his consecutive mishaps past few days (not keeping scheduled dates planned, forgetting dates, not having enough time) I kept on stretching things out, trying to understand but its always unfair when he demands attention knowing I have a shift at work but gets upset when I do that to him. (Opposite work schedules) the last straw was a week and a half ago when we planned a 2 week in advance date with my parents to go site seeing. Tickets booked in advanced, centered around HIS preferred schedule. Did not get to "remind" him about it the day before the event, and he didnt text or call the whole day because he got caught up at work. Appearing to have completely forgotten, he apologized on the phone saying he cannot make it and he is sorry (after I had to call him and wonder where he is), had I not insisted he try to make it at least, he would have not pulled up. He tried to come, but did not make it on time anyway and was waiting for us outside the event. I was beyond disappointed. More than I had ever been before. He did not seem to notice until I was just done...(not responsive, flat expression, etc) he KNEW what he did wrong. Noticed it. And did not try to ask or communicate but instead mirrored my actions. In this relationship, I have always been the one initiating compromises etc. This rare time when I wasn't in the mood, he did not try to step up and be the one to do it. Since then we did not talk on the way home and he did not acknowledge me when we parted ways. We did not block each other from social media, I still see him active from time to time, posting. Seemingly to blatantly ignore me. For the first time I feel flat. Usually our fights are passionate and filled with drama but this time, this is the first instance where it resulted in this weird situation. How long should I assume until it's over for us? (And no, I do not plan to apologize first because I know I am not in the wrong this time...it would potentiate his bad behavior if I apologize for something I know I did not do.) I am usually passive, but this time, I really do not feel like being a doormat.