Yes, I am definitely experiencing something similar, although in my case my teachers had been very supportive of my application and I was considered by them (if not by me!) to have a very good chance. However, now the results are all in (7 people applied to Oxbridge from my school, only I got in as the first person for 7 years) I feel a bit like a traitor, as after 7 years of my school's failure to get anyone in, Oxbridge rejection has become almost a badge of honour.
It seems everything I say is construed by some to be "rubbing it in". If I try to sympathise (which I genuinely do, I was distraught and angry at seeing so many exceptional candidates getting rejected) people think it's just "crocodile tears". If, I try and convince people to re-apply than I am seen as being pushy. If I shut up altogether then I "don't care".
Although, having said this, this reaction is very understandable, if I had been in their shoes I can't imagine myself being much better. These people have invested so much time and effort into their application and I think that they must be allowed and indeed expected to be a bit bitter. Overall, I feel that we really do not have anything to complain about, as we are in a much better situation than those who have been rejected. I think at least we should be able to put up with a bit of bitterness from our classmates