Does this make me a snob?

I just graduated uni with a 1st cl degree and am going on to do postgrad study and generally have high ideals/aspirations for my life..I feel uncomfortable around people who go no further in life then working as a cashier at my local shop. I am working part time at the minute in one of these places but honestly while I am humble and not arrogant behaving, I just feel I have nothing in common with them..I am also shy in general but my shyness is exacerbated when around these people..I end up feeling quite awful for feeling this way or I suppose for feeling I cannot relate to them merely because of perceived discrepencies in intellect which in all honesty might be entirely fictional. The only standards I can go by is how they dress, how well spoken they are, their general topic of conversation at times?? I just feel awkward I suppose. There are certain things I myself do not want to be--I want to speak proper english and not have my speech peppered with colloquialisms, I want to be cultured, I want to have a dignified dress sense then tracksuits and whatnot sold in pennys, I want to educate myself..I feel these people I work with are none of these things and so I try to reconcile my standards for myself with my personal morality which is to be good to people..