Girl's Behavior

Does she is just curious or trying to avoid me even she likes me in some way?

Hi, I need your opinions to understand a girl behavior. We were kinda friends, up until that point I told her that I like her. She offered just to stay friend as it is, but things has changed. During that 6 months period we had like 3 or 4 "cold", short chats. And here it comes interesting part to me. She and my sister are good friends and I just find out all these little chats were talked about with my sister. Every time she saw me somewhere in the city she also talked about it with my sister (how I looked and what i was doing). Can someone explain me what is happening? I tried to deal with my feelings and just let her go, but that information triggered something in me again, maybe i just overthinking?
Does she is just curious or trying to avoid me even she likes me in some way?
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