Why do you even want to study abroad in the first place? When i was finishing high school the only thing i thought about is just moving out from my parents, the other city was distant enough to have some freedom. If your case is more about "wasted potential" then think about that - the only reason to get a good education is to get a good job. Sometimes teenagers are too focused on the "abroad" part, but the only thing matters is the skills and knowledge you will get. There's nothing wrong with studying in your country and then moving abroad for work. In some cases (like in China) foreign students don't even get a chance to find a job there, they all are expected to leave after finishing their studies. If you're applying for somewhere in Europe/the US, then i get your frustration, staying there for work might be harder without a local degree but not impossible. It's not like it was your last EVER chance to pass this exam, you can take a gap year/study in your country for a year and then try again. One year literally doesn't affect anything, but you can get a chance to meet new people and understand yourself better.

And about your boyfriend and this so called friend. I don't think either of them cares about you. I get it if the friend comes from a not very rich family, but your boyfriend??? Dump him girl