<human>: Give me the gist of the text in a nutshell

I started seeing a girl and we have been on two dates. We both just had a messy break up so we're both okay with things going slow, we haven't even kissed yet. So this passed weekend while I was out of town she went and slept with someone casually. I heard this from two other people, she hasn't told me about it.

The two people both said what she did was weird but not the end of the world, because we aren't technically committed to each other. But our intent was to eventually be serious if things worked out, so I'm kind of upset hearing all of this. Should I just drop everything with her?
<bot>: Started seeing a girl, things were going slow but well, then she slept with someone else although we aren't technically committed or dating officially.