Winky face = sign of flirting?

Anonymous
Long story short, Me and this girl that I know for five years were chatting online. Talking about the times we had in college. We have the same birthday month (September) and I told her my birthday is coming up soon. She replied, "U right my fellow virgo ;)". This isn't the first time she did this. She usually put :) :P or ;) in chats we have. Is this a sign of flirting and she is into me? or Am I reading into this too much?
Is winky face emoji sign of flirting?
Is winky face emoji sign of flirting?
Updates:
+1 y
Here is another example...
We were playing the numbers game on Facebook. I gave her a number and she put on her fb status my number and what she thought about me.

So she wrote "We go back...hang out at my apartment. O yea and you get brownie points for being a virgo ;)"

So I wrote back: "How do it receive more brownie points? :)"

She wrote back: "lol it's automatic! You already got em. Haha"
+1 y
She also text "Goodnight :)"
+1 y
When we see each other out on the town. We'll hug and talk the be on our way. She would leave her friends to talk to me for a good bit. Leave, then come back to talk to me some more. She would ask me to dance with her on the floor. When I'm away from her in the bar. I see her looking at me.
Winky face = sign of flirting?
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