Inter-caste Relationship/Marriage (27F/M)

Hi everyone,

I write this post very broken, dejected and teary- eyed. What I'm going to write is nothing out of the ordinary rather very similar to many posts here. I write this just to get this off my chest since I can't seem to find anyway around this. So I've (27F) been working in Bangalore as Management Consultant for over 2 years. I met my current boyfriend (27M) in Bangalore same time when we started our jobs here and have been dating since. We've been planning to get married and decided to finally involve our families. I am originally from Bihar but settled in Gujarat due to my father's job and I belong to General category, however my boyfriend doesn't belong to General caste, his family still settled in a city on Rajasthan and his father works in a good PSU as well. We're both also single child. I've been extremely pampered since childhood and my parents are basically helicopter parents, you'd know this if you're aware of Bihari families and their parenting style. My boyfriend finally told his family and convinced them for the marriage but only if my family also agrees and are fine with caste difference. My family on the other hand can't seem to wrap their head around this caste part and are extremely against us. I've tried my best as many people do, to convince them with logic, emotions and everything else. But nothing seems to have worked yet (although it hasn't been very long since I told my father about this) My boyfriend and I are both MBAs, graduated from old IIMs. Our pay scale, likes-dislikes are extremely similar. Ideally in a bubble we're the perfect couple, we have met each other's friends, have become close with them and absolutely love and enjoy everything about each other. But my parents issue with caste doesn't seem to resolving anytime soon, we decided that we'll give them time and have patience to figure this out. But it's extremely tough for my mental state, I have very acute anxiety issues and being alone with my parents discussing this results in either me breaking down in tears or somehow excusing myself so that I can breath.

I really don't know what to do in this case. My bf and I have prepared scripts and everything but my parents seem to be extremely adamant about all this. I would really appreciate any tips over this. TIA