So, me and this girl have been talking for a while.  She was the one that approached me (indirectly).  We began talking and we started flirting more and more, all that.

Anyway, we hung out two times in a row, everything was all good, it went
extremely well both times.

We texted a couple times over the weekend, but then, out of nowhere, she stopped talking to me.

We live in the same area and ended up having the same group of friends, so wesee each other a lot.

When I used to see her in different places but didn't have time to talk, we'd just say hey and  flirt a little bit before we went on with what we had going on, now she'll just say absolutely nothing to me.

If I start a conversation with her, it will be short and boring when, just a few weeks ago, a conversation would flow effortlessly.

Instead of smiling every time I speak to her or laugh at almost every joke I made, now it's just a smile that you give a stranger to be polite.

The weird thing is, you would expect her to stop talking to me completely, but if I text her, it'll take 5 to 10 minutes to respond during the day and under 2 to respond in the evening. All of the texts reflect her old personality around me. It's weird as hell.

Idk what's going on.  I know you people are like super CSI problem solving motherfuckers, so I decided to come here.

What do you think happened and should I try to get everything back to normal or just move on, like i'm thinking about doing?