<human>: I (25M) met a girl (29F) a few nights ago, and we went back to my place. I rarely had random hookups in college, and this is my first one in the 3 years since college. 

We're going on a date this weekend, and I'm not sure whether or not to act like it's a first date. I like this girl, but I don't know if I want a relationship with her or not. Normally the first date would be when I try to figure that out. If I decide that I'm not that into her, do I owe her an explanation (or do I have to break up with her)?

Provide a brief overview of the text.
<bot>: I'm going out with a girl for the first time. We've already had sex. How much of a commitment have I already made?