Ok. Here is my story

I met this girl in a party that i did in my house. I flirted with her very well and i ended kissing her. When we said goodbye to each other, she gave me another kiss.It results that this girl goes to my gym and i saw her a few times but we only say hello and goodbye because i am always leaving when she arrives.

So... After that she started following me on Instagram and i thought that she maybe be interested on me and i followed her back.Because of that started to talk with her in instagram, answering her a story that she posted. And here is the issue:When i talked to her she showed 0 interest and was very curt with me and i dont understand what is happening here.

What do you think about this?