HELP!!! I DON’T KNOW IF THIS GIRL JUST PLAYING WITH ME OR NOT!

For context, I met this girl at a Fourth of July party at a family friend’s house. Girl I met call her J. My family friend and J are friends together. But here’s the actual story. Over the duration of the party J kept on looking at me and kinda I my space area. One particular moment was when I was lighting fireworks. J would kinda come up to the actual firework with me even though everyone else was kind of back. Also, we went our walk as a group and J was very open to me. As a group we were upstairs in a room and J was glancing at me every few seconds. so after the party, I texted my family friend being like what’s up with this girl and I told her what happened, which is all that which I said, and she said she isn’t usually this open to new people. But then J asked her friend, my family friend for my snap. So we added each other. J starts off with 3-5 sentences saying how much fun you had in that we should hang out again. So we were kind of talking for a week so I asked my family friend if we can hang out as a group. Me, J and my family friend which we did and my family friend left for about 2 hours, so it was me and J all alone we were chatting it up, talking about everything she was opening up. I was opening up. It was perfect eye. Contact was amazing. Spacing was amazing talking amazing. It was amazing. But then about a week later, she started snapping me less talking to me less, and then there was a point where she wouldn’t even respond to me for like four or five days I don’t know what happened.