What does it mean when a girl uses lol a lot?

[Someone who needs help]

So this girl that I know and I were talking on twitter. She said lol after almost every sentence and she does every time we talk through text. After our conversation, her next tweet was if u want to u have the green light.

[Paul Feinman]

I also say its her way of flirting with you.

[Josh Is Hawt]

Like the other answer said lol.
She doesnt want to be serious lol.
She wants to date you, but she doesnt want it to be too legit. lol.

[Erin]

One of my friends legit starts every text and facebook with haha. Some people just say haha and lol a lot thru text because they don't wanna be really serious, so it doesn't really mean anything.
Note: I'm not saying she doesn't like you, I'm just saying this is not a sign

[Nicole]

not much brain