If we text everyday, non-stop, is that flirting or buddies?

There's this girl that I have been texting back and forth for a month. We are both in steady relationships and even texts about that sometimes.We see each other once a week and she never mentions texting because a lot of people are around that know mine and her acquaintances. My question is, is she flirting or just being a buddy?
If we text everyday, non-stop, is that flirting or buddies?
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