This is a good question for you to ask your girlfriend,do you have bad breath? So go straight to the horses mouth for your answer all you will get here is guess work...good luck to you and your girl...
Why Did My Girlfriend Pull Away When I Tried To Kiss Her On Her Cheek?
Maybe she was not in the mood to such thing,or she could have been aving her bad time,just don't feel lyk having anything that very moment,or maybe she think kissing may turn to another long story with her...you don't av to be scared!all you av to do let her knw what she did was so bad that you really don't lyk such...MONLOVER.