I'm from east Europe, so the problem could not concern me as it has been written, as nobody here really flashes their money around like a clown. But I remember the feeling of being excluded as a student not coming from a top notch high school. The majority of the other people had nice groups of friends from day zero. But guess what - I graduated with a really good diploma, easily landed a job at a major tech company, and most of these people are now my friends or colleagues.

What matters in the end is your results, and your results only.