1. File a police complaint about his absconding and keep a copy of it.
2. File a complaint before NCW (national Commission for Women) through e-mail and if you are a delhi resident file it personally. They have a separate wing to follow up NRI victims cases.
3. If you get any consolation out of this information, that victims like you are thousands in numbers. Some of the brides were deserted at IGI Airport by their callous NRI husbands after enjoying their money and body. IGI Airport received such complaints on several occasions.
4. Till completion of one year, you cannot file divorce case. If you show extreme hardship, then court permits you to file such petition within one year. My suggestion is wait for one year and in the mean time collect evidence such as emails what you have already and also the complaints of above said nature. You can get divorce on the ground of adultery and cruelty but not on the ground of desertion, which requires minimum 2 years separation.
5. For getting successful divorce decree, the respondent's address is must. As per the latest procedure, in some cases, even e-mail service is accepted by the courts. Any how, it is better to get correct address of the husband. For that engage a good detective agency and find out his correct address. If he refuses to receive the notices or in some other circumstances, the courts will allow you to go for paper publication of notice and after that, hearing you, grant ex-parte divorce decree.
6. The procedure of serving the summons in USA is through Ministry of Foreign Affairs. Several circulars were issued by the Govt. in this respect laying down the procedure to be followed in such cases. But experience shows that they are not effective. In India, the most difficult thing is to get the notices / summons served on the opposite party.
7. Find out, if he has any movable and immovable property. That will help you to bring him out from his rat burrow.
8. It is not just the question of you to get divorce and settle for another marriage. While you do so, without having any revenge in your mind, but such people should be punished severely for exploiting the girls mentally, physically and economically through procedure of law, so that they will not come back here again to hunt some more innocent girls.
Wish you best of luck.