What are my chances of getting in as an oversea student?

This is very reliving and emotionally satisfying to know , so thanks. One more question: Is it true that oxford is easier to apply for as an international student than cambridge, or is this just a myth?

Well if you applied for Oxford you'd have the option to be interviewed in Vancouver/New York City, whereas if you applied to Cambridge you most likely have to fly there if you want an interview. So in that sense it is easier (on the wallet) to apply for (:

Yes but how much of a disadvantage is an international applicant at compared to native applicants?

Thanks for the replies so far. One more question before I go to bed : has anyone every applied from NA (north america) and been offered a place at cambridge?

None. Academically the same is expected of you as a native applicant (though for some international students this will all happen in a foreign language, so there is that difficulty). It is in Cambridge's interest to take the best applicants regardless of where they come from.

The application process will happen as fairly as possible. Obviously, though, international applicants will have to travel further for interviews and may not have the chance to attend any open days. They also won't have help from their schools as some UK students do (though this is something that varies among UK students too). However, all the information you need is available on the web and you can always address questions to the admissions people in your college. Provided that you research your application thoroughly, you will not be at a disadvantage.