Thank You for posting your question to just answer today. This is attorney Bill offering legal information specific to your concerns.
If your partner is coming to the US on a tourist visa his intentions should be for tourism only and not to get married or to seek employment.
To ensure he is admitted by customs and border protection he should have evidence of permanent ties with India.
If his purpose is to come to the US to get married you need to for a fiance visa.
This is a k1 non immigrant visa and you need to file the form 129f with USCIS to apply for this visa.
Here is the correct link.
It is very important that your partner comes on the correct visa type as a denial of entry or visa revocation can have negative implications on future visa applications.
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