So i met a girl for drinks at a bar near my place on Friday, paid for drinks but it was just $6 per and I always do so when it's a first date considering the cost is negligible compared to dinner and just feels like the right thing to do when I asked them out.

Went back to my place, banged, hung out a bit, she left. Texted her today with a pretty standard we should hang out again and she agreed. Ended up asking her to hangout tomorrow, she replied with "Sure, do you want to grab dinner or something?" Now I haven't replied yet since I wasn't entirely sure what to say to stay safe and not lead her on. I think I might've fucked up by asking to see her again so soon, but I'm a horny dude and she was the most "sure thing" I knew of. I know she is leaving the city in a few months so I know no intent of long term relationship from her which is good.

Coming here since I don't have any experience with extending friends with benefits, I've always either done a one night stand or gotten emotionally invested and started dating. Any tips or advice on next steps? Not this particular girl just in general since I assume this situation would pertain to tons of people here.. I mean you want to keep a good thing going as long as possible while still retaining other options. If I do go with dinner is it cool if we split it? Thanks guys!