You don't think that what made her feel attracted to you was your personality, do you?
There are so many people with normal, human appearance, you are just one in a world of billions.
The only thing about you that interests her is that you are a werewolf and especially the beast form, it is what she wants and what she likes, without the transformation you are just a source of drugs for her, a total slave.
And she is one of the most powerful vampires who hunted werewolves to the point of destroying entire clans, if you think you can "defeat" her without doing your best, good luck.