Should I stay or should I go ?

[Carl seawick]

So I've been talking to this girl for about 2 weeks. We met online on a dating app and everything seemed to be fine. We met up once and just hung out for a little bit and we were starting to plan a date. The day before our date she tells me that she can't make it and when I ask her why she never responded back to me. Note that we have been talking on a daily basis for two weeks now and all of the sudden she stopped talking to me(weird). Since I had her as a friend on Facebook I asked her if something was up with her phone and she replied two days later and said that she didn't have it with her. So tried to talk to her over Facebook and no respond except the one I got. So a few more days pass and I'm using the app that I found her on and I see that she is online and Added new pictures to her profile (reiterate this is an app so she had to have her phone to use it). So I decide to shoot her a message and asked if she was done talking to me and of course no respond. I ask my friend wh