Regardless of what language you speak, the international language of body language allows all cultures to communicate. It allows anyone of any age to express themselves, from an infant right up to the elderly, without even speaking one word. There’s no mistaking the meaning of a smile, a wave or a simple hand gesture to ask for or to offer assistance.
If the girl you are with is interested in you, she will exhibit certain signs of attraction and encouragement. You just need to recognize them and act upon it. However if you’re hesitating to invite her, another man could jump in as well. http://love.ygoy.com/love-stages/friendship-turned-love.php