Is this a general INFj trait?

[Pastel]

Then again I don't act rude with strangers; despite my shyness and coming across as hesitant and 'nervy' I make them feel like they're listened to and I am polite. My default is politeness, though yeah, if I'm unsure of intentions or feeling overwhelmed with my own social anxiety, I'll exit ASAP and go panic in a toilet cubical or something :/

YES!! haha. Same here. I really dislike my social anxiety though, I often feel bad after for having had to excuse myself and run away or something cos of my nerves ><