What wold u do (read intro)

ok..you like this person and but they are your best friendz ex and you are like best friends you have everything in common and you realli like them.....and you are about to go out with them. But you find out that the person you liked and your best friend have been going out for a while all over again!! And neither of them told you about their relationship. even though your best friend knew you liked this person..............would u b mad if if you are at hoo