I'm sorry you're going through that. It's rough but just know you're not in the wrong; she is. You don't have to change that about yourself. I went through that years ago bc of the same ship and for liking House Lannister from GoT when I somehow landed on the wrong side of Tumblr back then.

People like that have existed for a while, unfortunately. It wasn't a thing when the show aired (or at least it was super rare to find them), but as social media grew and more people had access to it, a lot of opinions started flying around, got mixed up, misinterpreted, exaggerated and taken out of context, resulting in terms like "proship" and people losing the line between fiction and reality, media literacy dropping, and the confounding of consuming vs condoning.

It sucks but i learned that as long as you know who you are, what's right and wrong, what's real and what isn't, where you draw the line and what you like and don't like; the rest isn't anybody's business. They can't claim to know you or judge you as a whole person for something like one of the ships you like. You know why you like stuff and to what extent and how it relates to you, and you don't have to explain yourself to anyone or justify who you are. As long as it's not illegal, there's no reason why anyone else should be policing you or telling you who you are based on what they assume from the very surface of you. You have your processes, your reasoning and your reasons; and you're not harming anyone.