How long does it take to get a girl to like you?

I personally don't think there is an amount of time actually. I know though, it takes patience and action. You cant just expect a girl to like you if you do nothing right ? Unless you attract them in some sorta way. What I suggest is to patiently talk to her, care about her but don't overdo anything or you might just annoy her. Eventually, she'll become more attracted to you, flirt with you and smile and laugh with you. If she's shy, then you'll notice little giggles when you two talk and she might blush abit (: