I just stopped talking to her?

We've been friends for a couple years and have had on and off feelings for one another but nothing has ever panned out. The last few months I felt she was flirting with me again (maybe I'm misreading it) and I just stopped talking to her because it feels misleading. She's contacted me a couple times over the last couple months I've answered but I've have been short and told her I'm busy. I feel guilty for not explaining it to her. What would be the best way to deal with this?
I just stopped talking to her?
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