guy asks me out at mall, i say no

while standing outside of williams and sonoma, a teenage male asked me out. i said no thanks. and he said, “what’s your problem? whatchoo don’t think i can buy you a coke?” as though that would make a difference. i walked away. his friends booed me, violently. he then yelled at me, “i can buy you a fucking coke bitch!”
and then of course something about diet coke and me being a fatass.
ouch.