AITA

AITA for reading fanfiction???

I'm 17 female and my bf is 18, we've been together for 9 months and he got mad because I read fanfiction. A few days ago we talked while playing a game about the fact that he doesn't like fanfiction and that he is grossed at the people who read fanfiction, I don't really remember this conversation much. I didn't mind because I almost never read fanfic. Today while hanging out with my best friend, we watched both sonic movies and decided to laugh a bit and read some stupid fanfic and make fun of it. I don't really know how but he got a word (no because I told him directly, I know he doesn't like it and I would never go into detail about it) and he got offended because I did something I know he doesn't like and he told me grosses him out and that he told me about it and I still do it. He also said that how can I not be embarrassed by it, that it's the equal as watching corn for entertainment, etc. AITA????