Since you are residing in US and your husband is residing in India, you may have to file a divorce in India only.
You may file a divorce case on the grounds of mental cruelty and desertion etc.
in the pleadings for the divorce case you may mention the entire issues of concern that have taken place in your married life sequentially in a chronological order.
You need not produce evidence for all the the bitter incidences that took place or that have led you to decide about this drastic step.
Wherever you have any documentary evidence to support your pleadings, you may attach them with the plaint of the divorce case.
If you are not able to travel to India to follow up the case properly you may give a power of attorney deed in favor of nay of your close relative in India and appoint him/her as your power agent to conduct and prosecute the case on our behalf through your lawyer and you may appear before the court during deposition of evidence alone.
Have personal discussion with your lawyer before initiating any legal process.