I am the top "best friend" on this girl I like's Snapchat, could she like me?

Anonymous
This is a pretty generic question for girls, there is this girl that I've been talking to a lot recently and I suspect she may like me, for various other reasons that what I am going to say on here. We snapchat each other pretty often and often times have conversations through snapchat. I saw recently that I am now her top "best friend" on snapchat, and before I wasn't on her best friends list at all and the top spot used to be her ex boyfriend (who is now no longer on the best friends). She doesn't sext me or anything like that, but every time she sends a snap to me, she almost always tries to draw attention to her chest/cleavage. (that could be a coincidence but I'm not sure)

Anyway, my question is, can I take this as a sign that she may like me as more than a friend? I know I can't decide if someone likes me based on a social application, but would a girl snapchat someone that much if she wasn't interested? Especially when the previous person she used to snap the most was her ex?
I am the top "best friend" on this girl I like's Snapchat, could she like me?
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