Tough situation?

I've been noticing some mixed signals from my close friend's sister, and it's been a bit confusing. We have this comfortable dynamic where we're often in close proximity, play-fighting, and she sometimes sleeps around me. Some days, we share a strong connection with meaningful eye contact and playful banter, but on other days, she seems cold, distant, and avoids me entirely. I'm starting to wonder if I'm doing something wrong, or if there's something else at play here. What's going on here and please feel free to ask questions about the situation

Tough situation?
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