no not flirty, just to fill in the space
i use lol at lot and that's definitely not a flirty thing
Some people just say ha ha with everything. And its just to show she's teasing.
It's less about being flirty and more about not really knowing how to respond...it's like saying lol or some other one-worded response
I say "haha" a lot when I'm bored or have nothing really to say. It could be that she thinks you're really funny but I doubt that if she says "haha" everytime.
I say "haha" all the time when texting or on Facebook or something. I wouldn't say it's a way of being flirty, just kinda something I naturally type when I think somethings funny..