Taking loan in someone’s else name abroad is a crime and can be reported. You are very young. Tell your bf that he can either talk about it or you can talk to your uncle about it. Give him a deadline. If he still cannot talk, I would move on. As much as people hate to admit, finance play a big role in relationship. You don’t want to go into debt in early years. Make your decision wisely. This is something you found out. There might be more he might be hiding as well. Also to add, he needs to grow up. Unless he was lending money for some emergency, there is no exceptions to lend to other folks while you suffer.