<human>: Can you give me a shortened version of the text?

I've been seeing this girl, albeit rarely. We met on tinder ages (about 4 months) ago, and randomly decided to start talking to each other after I inboxed her on Instagram a month or two ago. 

We have the same sense of cheesy humor, and disregard for social norms. We have many similarities, and texting her gets me through my boring workday.

Here's the problem. On Instagram, she posts pictures of herself with this dude that I don't know. He looks like an okay guy, not gonna lie, and she uses #bae, cuterthanyou, etc. Here's the other problem, the first time we met up at a local mall, she pulled the old "I'm gonna try on lingerie and invite you into the changing room and hope you'll pull a move" endeavor. 

There are no mixed signals, she's expressed explicitly, and on multiple occasions, that she'd like to do the in-and-out with me.

So call me old-fashioned, but when I have a FW/B, I pretty much only okay with it if it's exclusive. I'm looking to either become exclusive FW/B or to try out an actual relationship.

So do I wait it out as a friend, try talking about it indepth with her, or just call it quits? I'm here for advice.
<bot>: Girl I'm hanging out with has an unofficial "bae", expresses that I make her happy and would like to sleep with me. I'm looking for exclusivity, wondering what to say/do.