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

Build-up (because that's important, right?): Girl is currently 16. Known girl for 3-4 years. "Best friend's little sister" that turned into "friend" of my own with separation of best friend. We talked a LOT for the first half year. I told her I liked her. She said she did, but not at the time, and it was weird that I liked her because I'm her older brother's friend. 

We stayed friends. I care about her and I let her know that on occasion. She comes to me for advice about random things sometimes, and advice on drugs (because she knows I've been around the stuff and I use to smoke). We've hung out either at my old high school events or through her brother. Only alone when I took her home a few times. 

**Now today** I get a text out of the blue saying, "We should hang out this week!" Trying to figure out if I'm being used as a ride to a party or something I say, "We should! Do you already have something in mind?" With that she replies, "No LOL." She's figuring out if she's free Thursday, for no specific plans but to hang out. Might I say I've never gotten this text from her before in the past 3-4 years. Is she wanting to just hang out purely as friends, or can something more be inclined?
<bot>: Me 22M, Girl 16F, been friends for 3-4 years. Very first "We should hang out this week!" text ever. Does it imply anything more than simple friends?