NTA

Honestly, your fiancé sounds like a piece of work. I am not a vampire but I did grow up in a Japanese household and my parents made sure that I was raised with Japanese culture and customs in mind. They ingrained in me the importance of my heritage and that it important for the world to accept not only our culture, but cultures of all countries around the world.

Now I know that Japanese culture and vampiric culture has many differences. For example, we like sushi and you guys like sleeping during the day. But we are similar in the sense that we should be respected for our beliefs.

My fiance hates sushi. But he eats it every day to show his devotion to me. He is happy to gag on the raw fish that he hates to respect my culture. And I am happy to keep feeding it to him and watch him gag. He asked me to watch the World Cup with him because it is important to him and I told him to fuck off as I shoved another piece of salmon in his mouth to shut him up. It honestly is the healthiest relationship I have ever been in and I am so happy that I married him.

If your fiancé will not do this for you; will not let you bite her on the neck, will not let you pierce her skin so blood drips down and she screams in pain, will not let you change her entire lifestyle as a show of devotion to you, then you should leave her ass by the curb.