How do you know if she wants a hug?

i wastalking to the grl i like and at one point she metions on how she misses gettn hugs and all that stuff n i was like ???? in my head yea i know im clueless evrytime n then 2 min ped for sum weird reason i gave her a playfull punch like a soft one that dont hurt n she punchd me back with a cute smile n sum giggles i barely heard. n we kept talkn im gettn off topic yea uhh im done im shy by the way but i just get the urge to get my *** up n talk to her