I have friends who went to pretty good universities (world top 10), and I would love to apply too after my Masters although I am not sure how realistic this is, as I also had some personal problems during my undergraduate degree affecting my grades. However, I feel bad every time I think about it and realise that my university right now is not Oxbridge / Ivy League -although I too ultimately am interested in a career in academia.
One of my friends got into Oxbridge and I don't think he's more intelligent than me or particularly gifted at all to be honest, -but I just don't understand? - And: yes, I should know that it doesn't matter that much, and that I should not compare myself and not let this take over my thought processes. But I cannot seem to help it, it's on my mind a lot. And it's even keeping me from studying. - any advice?