I need help in cyber dating problem stalking??aah!?

well i met the nicest guy on a site, and we had "fun" chatting..i stupidly played along.. we both have a boy/girl friend but we re two timers. he wanted me to go visit him where he lives. since we re both adults we can do anything, and i stupidly said i ll go to him..but now i dont want to!!i want him,but i wanna stay here. i havent met him face to face but we know each other from college..(everybody was linked to each other on the site,and we found each other) so now im confused and im probably confusing you..so i ll say.. HELP!wat should i do?