Im having a little trouble thinking when is ok to leave and interaction or when is ok to keep persisting. By a general rule, if a girl gets mad, i consider that a fair reason to leave the interaction, but does it has to be that way? im not an expert.

What are you guys thoughts on this?

By my own experience, i had an interaction 3 days ago where i open a girl that was walking her dog, at some point she got angry at me and said something like: "What do you care, dude?" in a rude demeanor, so that's a pretty clear one to get the fuck out, but sometimes is not that clear.