Often, couples who are in a dating relationship will have the foreigner apply for a visitor visa to the U.S. They know that mentioning the dating relationship as part of the application process can trigger a B visa denial, so they choose to keep the relationship a secret, a dangerous move.
When processing on an immigrant visa or on a green card, immigration officers consider the entire immigration history and this can cause problems for a couple who was less than truthful on the B visa application. Here is an innocent inquiry together with my reply.
I need information on marrying a Belarusian. We have known each other a little over 5 months already. We have definitely met in person. She is a few days away from interviewing with an ambassador to come to the United States on a temporary visa. I am afraid she will get denied. Will the visa denial hurt my chances in the future, for example if I want to bring her here on a marriage visa?
Cesar, Thank you for your inquiry. Have you read the information on our site concerning B visitor visas? Here it is: B Visa for Visitors
When she goes for her interview, will she say she is coming to see you? If so, her chance of obtaining a B visitor visa is likely not good at all. There is a risk she might overstay her welcome as a visitor. Your promise to return her to Belarus is not good enough. People change their minds. She might get pregnant. She must have a strong incentive to return to Belarus when her stay as a visitor ends. The fact that she has a U.S. boyfriend suggests her roots in Belarus are not strong. She might want to immigrate to the U.S. based on the relationship.
If she does not mention she is coming to see you, then it may appear that your relationship is not important to her. When applying for fiancee visa, spousal visa, or green card, immigration officers can and often do look back on prior applications, including a B visa application. They look at the entire immigration history. You are already dating and have been to see her, but she does not want to see you? Either you are not important or she was not telling the truth on her B visa application.
I generally will not have a foreigner apply for any U.S. visa unless I am 80% certain the visa will be granted. It is better not to be denied than to have been denied. I hope this information helps. You are welcome to call to discuss further if you like.