Okay, let me rephrase to see if I understood it correctly. Something happened a year ago which he thinks you have not sufficiently atoned for. He is trying to hurt you, because according to his perception, you hurt him first. He can have his unique definition of dating and you can dislike labels alltogether, but at some point in any discussion, words have to start meaning something everyone can agree on. The way I see it, you are having an ongoing discussion on the boundaries of your relationship but to avoid losing face, are pretending not to be invested in the outcome at all.
Me: bi female in my twenties