Well, it depends on a couple of things. If your relationship with the girl back home is casual (and the two of you are both on the same page about that), and the relationship you want to have with the chick in the bar is casual too...well, no harm, no foul. But if there's something more serious going on with either one of them - either because you're in love or they are - then you need to be an adult and call it off with the one you aren't in love with. Simple as that.
no subject
Well, it depends on a couple of things. If your relationship with the girl back home is casual (and the two of you are both on the same page about that), and the relationship you want to have with the chick in the bar is casual too...well, no harm, no foul. But if there's something more serious going on with either one of them - either because you're in love or they are - then you need to be an adult and call it off with the one you aren't in love with. Simple as that.
Sincerely,
YT