I think if they are so in love with each other, then her going to study would increase their love for each other wen she comes back
. If he is willing to wait for her, their marriage will form a stronger bond, she's still young wanting to go after her studies is a good thing, he could be a good boyfriend and support her, but if he doesn't love her a lot, or if he suspects that she is just stringing him, then keeping the relationship would really be a waste of time. I presonally would support and be cheering her from the back and be there if it gets to hard for her. Neways~ goodluck to ur bro man.