Fountain pen.
Gifts to students going abroad, special gifts for going abroad, generally should not be too expensive, because people going abroad like trendy gifts, so give them something they like or like, such as pens, Or something like a watch. If the other person has no income, you can consider giving him some gifts that he needs.
Choose to give a pen as a gift, which will remind your boyfriend of you when he is studying abroad. When he uses the pen in class, he will think of you, which will help maintain the relationship. Give him some special gifts that are commemorative and can also make him feel loved and warm.