Coworker acting strangely ?

I work at a bar and one day I walked in o the glass wash room next to the bar and a girl I work with thats kinda new who I haven’t talked to stared at me kind of smiling a little as I walked in the doorway as she was sorting glasses and she didn’t look away but I thought nothing of it. The next weekend I needed to ask her where this food was going to as I was going holding the plates and she put her hand on my arm (around my arm I think like holding might have been nothing) as she pointed the table out, when I walked back round to wrap cutlery she stood in front of the cabinet with her hands on her hips tilting her head left and then right while she looked at me as I was wrapping cutlery on and said ‘you make me sweat, Darren’ and then come to the side of me and held her arms out for a hug and smiled to which I backed off because I was like thinking ‘wtf’ she then dropped her arms and walked off. The next night we were on a close the pub shift and in the staff room at the end of the night as she was putting her coat and scarf on she said ‘I haven’t got a boyfriend you know, Darren’ and smiled as she was putting on her scarf and the other guy at work there with us laughed out loud as he was on his phone and I looked at her and smiled at me after saying it and then look away to carry on putting her scarf on