Do a search on the message boards -- the link is at the top of each page -- for postings by dileep, a medical oncologist (chemotherapy expert) in India who had surgery in August to remove a cancer in his cheek. Once you can see his profile, you can get his e-mail address to write him, or you can send him a private message through this site. I expect he could provide you with specific advice concerning the best treatments and facilities available in India.
You certainly have come to the right place to learn. Once you know a little more about your boyfriend's condition, you will find lots of helpful information both on these message boards and on the main part of the site.
All the best,
Leslie