Encourage him to think about his long-term goals. For example, he can think about his hopes for what his life might be like in ten years:
- Where does he want to be? (Which country? In the countryside? In a city? Near his family?)
- Does he hope to be married? To a woman from his culture?
- Does he hope to have children? Who share his language and culture?
- Does he hope to achieve a certain professional status? (Such as a doctorate, or becoming a lawyer, or a medical doctor?)
- Does he hope to own a home, land, and/or a business?
Then he should consider whether studying in the U.S. would help him achieve his goals, or whether it would make it harder for him to achieve his goals. There might be very few eligible women from his culture nearby in the United States; this might either cause him to marry outside his culture, or limit his options, or force him to delay getting married. Would an American degree be helpful for achieving the professional status he seeks, in the place he hopes to settle? An American education can be very expensive -- would student loan debt restrict his options?
Are there other ways that he can achieve his goals? Some topics are best studied in America, but others can be studied equally well (or even better) elsewhere.
Are there ways that he can mitigate the disadvantages of being in America? For example, he could ask his parents for some of their favorite recipes, so that he can cook them in America.
Please understand that these topics are not meant to "talk him out of" the idea of studying in the United States. Instead, they are about encouraging him to reach for his dreams.