Coworker interested?

TD;LR; Is my coworker showing interest??

Long story short, I (M22) have a coworker (F20) that has recently started working at my shop.

She seems kinda shy even tho she's much more relaxed than when she started working with us, however, I'd say 90% of the time I look at her she's already looking at me and as I look she turns her head another way. Whenever I speak to her she seems to get a bit uncomfy but at the same time interested. Today, I was carrying some heavy boxes and she was passing in the same corridor, and I slightly pokes her libs with my knuckles (not in purpose the corridor is quite narrow) she immediately looked red like a tomatoe. Another thing was she asking me if i was married because of my ring.