Can I marry an American and reside there without losing my Indian nationality?

India does not allow dual citizenship, so if you ever became a US citizen, you would definitely lose your Indian citizenship. However, if you marry a US citizen and obtain a green card (legal permanent residence), you can live in the US pretty permanently without applying for citizenship.

However, do be aware that if you leave the US for an extended period without prior permission, it is possible to lose your green card. If you commit any crimes, especially those listed as "crimes of moral turpitude," you can lose your green card. It will be up to you, your actions, etc, which determines whether or not you will actually reside permanently in the US if you obtain a green card.

Yes, you are correct. The only way you would lose your Indian citizenship is by applying to become a U.S. citizen by naturalization. India does not allow dual nationality -- you automatically lose Indian citizenship when you become the citizen of another country.

So, you will still be an Indian citizen and eventually become a permanent resident of the U.S. There are numerous foreign citizens who live in the United States as permanent residents and simply choose not to become U.S. citizens. For example, my best friend's parents are British citizens only and have been U.S. permanent residents since the 1970s.

If you marry an American, you can become a Legal Permanent Resident. Legal Permanent Residents are not US Citizens. You would hold the citizenship of your country and be allowed to live in the US legally and permanently (unless you do something that can get you deported).

Yes you can, you don't have to take American citizenship, you can also have dual citizenship if your country of origin allows it.

Of course.

Please don't, we don't need any more Indians.