Was it verbally agreed or heavily implied this was a date?
Pretty disrespectful on her end if that's the case. Regardless if she lost attraction, or was more attracted to the other guy.
As for prematurely leaving, I don't think you'd come across as jealous or disrespecful; as long as you did it in a non-spiteful way. You'd just be executing higher status qualities, and reinforcing a stronger frame. You definitely did damage by sticking around and falling into the other guys frame.
Pretty disrespectful on her end if that's the case. Regardless if she lost attraction, or was more attracted to the other guy.
As for prematurely leaving, I don't think you'd come across as jealous or disrespecful; as long as you did it in a non-spiteful way. You'd just be executing higher status qualities, and reinforcing a stronger frame. You definitely did damage by sticking around and falling into the other guys frame.