From what i know, not your gf nevermind. She has bf also doesn't
matter. What matters most is that she has interest in you. If
you've been dating her for sometime and she's really happy every
moment spent with you, why not ?
Of course all these holding and hugging depends on your approach,
the distinct period of dating, place and also how good you are. If
it's only casual friends and you do that to her of course no chance
lar...she might even slap you.. 
