<human>: Can you provide a brief rundown of the text in within 3 sentences?

So I'm a junior (m 16) in high school and there's this other junior girl (f 16) who I've known for three years and am good friends with who I've been into on and off this year. She starts flirting and sending me all the signs that lead me to believe she's interested. This isn't just light flirting, like I'm thinking it's pretty obvious she is into me. 

She would randomly sit on my lap, touch me a lot lean into me when we were together, I even noticed one of her good friends one time was standing between us, then she looked at both of us and instantly moved out of the way from between us as if she wanted us to stand together.

So I worked up the courage yesterday to ask her out yesterday and she starts off with "Here's the deal..." (Great this is gonna go well). She says "I'm not at all looking for a relationship right now I just wanna have fun," and she repeated that fun part a couple of times. I have to know what could she possibly mean. I mean why would she flirt me up so much the past few days if she knew I was probably going to ask her out if she did so, and did she want something other than a relationship?
<bot>: girl I've known for a few years really starts flirting with me then I ask her out and she tells me she's not looking for a relationship.