My girlfriend (24F) has a choice between me (25M) or her family and I don't know how to tell her

This is a throwaway, as you can tell from the username.Hello everyone, hope you guys are staying safe from coronavirus.I met my girlfriend when I was in my senior year in college, she was a junior back then. We have been dating for 3 years now. I'm Asian and she's white. To say I don't deserve her would be an understatement. She's the most beautiful and the smartest girl I know and she comes from a pretty wealthy family. I'm not particularly handsome or attractive, not extremely smart (just because we both went to an Ivy League college doesn't mean shit, it just means I have slightly above average IQ but I decided to work harder than most other high schoolers), and our family is not very rich either. We aren't poor, my parents were able to help me pay for college and I only had to take a few thousand in student loans, but we are certainly not as wealthy as her family. I really love her and I try to be the best boyfriend I can be.Unfortunately, her entire family is racist except for her and her brother (who is one of my best friends). Every time we go to one of her family gatherings, there are racist comments tossed around. It's against everyone who isn't white, including Asians but also African Americans, Mexicans, etc. I am the only one there who is not white. I don't know if they are trying to insult me intentionally with comments like "Oh those yellow (n-word)s stealing our jobs" but it not only annoys me on a personal level but also just like in general, they're being such racist assholes. But I try to be as nice as possible because I don't want to let this ruin our relationship. But her family members still all dislike me.So yesterday her dad texted me. I knew that my girlfriend's parents know my number but it's still strange because her dad doesn't like me at all and we have never really had a 1 on 1 conversation. But anyway, he sent me a few texts saying "This relationship has gone far enough" and to sum things up he said that if I didn't break up with my girlfriend he would disown her and her entire family would cut her off. And then he said if I really loved her I would know that her family was more important to her and stuff like that. I have no idea why he decided to say this now and not like 3 years ago when we first started dating.I haven't talked with my girlfriend yet because I don't really know how to tell her about this. I know she loves her family and I don't want to hurt her relationship with them. But I also don't want to hurt her by just breaking up with her without telling her why.I really need some advice here my fellow Redditors, how do I tell her about this situation? Even if we do end up breaking up, I want to do what makes her happy in the long run.TL;DR My girlfriend's family is racist and they don't like me. Her dad told me that either I would break up with her or he would disown her and her entire family would cut her off. I don't know how to tell her about this. via /r/relationship_advice https://ift.tt/36oYxeE