Girls eye contact is she interested?

For a few weeks she started to always be smiling and giving me eye contact and then when I try to talk to her or approach she seems nervous or ignores me or acting busy. I’ve backed off a little and ignored her sometimes but still give her a smile now and again. I’ve noticed though she still looks at me and she saw me the other day and purposely walked passed and flicked her hair? Then I walked by her with a friend and noticed from the corner of my eye she looked up and looked at me for 4 to 5 seconds at my face? I don’t know what it all means with eye contact and all but I’m confused if she’s interested or not?

Girls eye contact is she interested?
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