He's gin' out w/ another girl, wat shud i do??!! HELP!!?

i thought that me and bf were getting back together, well i call him last nite to ask one last time and make sure that we were adn he says, " i dont know, im datin this other girl rite now." and i sade " well i thought u broke up w/ her" (long story) " i did but this hot girl asked me out and i couldnt resist." all i sade was "oh okay then bye!?" but he hurt me and i dont know how to tell him or wat i shud do!!! he really shudnt have led me on like that on break my heart AGAIN!!! boys r soooo stupid sometimes. i need help and advice. ill c him friday and i dont know wat i shud say 2 him! HELP!!! PLEASE!!!