I kissed my best friend during a sleepover. I'm not sure if I have feelings for her?

I was sleeping at my best friends place (girl by the way) and we watched movies together. Then we leaned more against eachother. When we went to sleep her head was laying against mine and we just started kissing. We both didn't know who started and we are both very confused. I know she has feelings for me but i am not sure how i feel abour her. Will this ruin our friendship?
I kissed my best friend during a sleepover. I'm not sure if I have feelings for her?
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