I actually have a similar situation except we are gf bf. Some things that I didn't consider before our relationship took off.
The country he is from speaks a different language than I so how to live together if I can't adapt to his lifestyle...? He moves to my country? Visa? Marriage?
Currently he is a med student which is a bad bad because it would take years before he finishes. Transfer to a college and end up risking starting college over again? Not only that but how to pay for residence and college without parental support if he moves over?
It's a lot to fucking think about so unless you aren't ready to make a lot of sacrifices you shouldn't proceed.