I like this girl, but she give me mixed signals back. What to do?

I like this girl. She's a great person and we usually got great chemistry. But sometimes she shuts off completly and act like i dont exist. And she never answers personal questions when we text. While other times she want me to film my competition lifts (weigtlifting), to show her later. And she pretty much stalks my social media accounts. She also loves playfull banter. And looks at me like no one else. It might be because i sometimes ignore her at the gym. Because i need to focus on my training for the national championships. But i dont know what to do next.

I like this girl, but she give me mixed signals back. What to do?
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