This is a difficult cultural issue for those of us in western countries to fully be able to appreciate. I'd only say that if you've made it to 30 without submitting to an arranged marriage you're probably pretty strong-willed, and mores seem to be changing for professionals in Indian cities. Maybe there's an accommodation that can be made somewhere that will sit well with all parties. Good luck.
""""I am under a lot of pressure to get married."""""
Thats got to be the worst reason to get married. I'm surprised that you never attempted to seek professional help during all those years. But its never too late.