SUBREDDIT: r/relationships
TITLE: Me [22 M] with girl I'm dating [22 F] for a little over a month from Tinder, how to communicate about wanting something more casual and NOT a relationship after sleeping with her
POST: I met a girl over Tinder last month. We are both recent college grads living at home with our parents. We've gone on normal dates, mostly just getting drinks and then taking a walk and making out every 1-2 weeks. Last night was our 5th date and we had sex.

I do not know what she wants. And she does not know what I want. We haven't communicated about it. I merely want to date casually and not exclusively for now and definitely not a relationship. It has nothing to do with her, just with where I'm at in life.

The thing I'm nervous about is if she wants something more and I do not. There are signs that she has romantic feelings for me. I feel bad for having sex with her when we haven't communicated what we wanted yet. I don't want to hurt her.

I'm fine with what we're doing so far very casually. I like to be with her, but I don't want anything serious. I am VERY new to casual dating and dating in general and have no idea how to go about this.
TL;DR: 
Me and girl haven't talked about where we stand and I am clueless about casual dating. How do I communicate with girl I am dating about what we want?