How to know if a female coworker is trying to get my attention?

Ok I work at a big warehouse and I don't know everyone on my shift but we all eat in the same breakroom together. And I usually sit by 2 of my friends (males) everyday at the far end of the breakroom. This breakroom is very large. Tables everywhere.
And she always sits by herself across the room about 10 tables away.
But today at our 2nd break my friends went home early and I went the normal spot as always and sat by myself. There are 3 tables lined up for a long row and there are many rows.
She comes over and sits in the very next chair beside me with was about 2 spaces from me. Leaving the entire line of swats open. So I figured finally I get to talk to her because she is VERY attractive as we don't work next to each other. But she then proceeds to take her phone out and earbuds out and put them in and watch videos on her phone. Also her table nor seat was was not taken.
So should I have interrupted her and asked her about her day? I ended up not saying anything. Am I looking too hard into this? I don't understand women's "cues" or "hints". Then after break she got up and left. With saying a word.
Although I will say she did briefly look at me when I got back on the warehouse floor. I was walking to my area and was not super near her.
Updates
2 mo
I talked to her after I wrote this and all went well. She's new to kansas and just moved here from middle of nowhere Mississippi. She seemed to like our small talk. She smiled a lot. And giggled at some of my joke like things I said. But she's country and has a deep southern draw and I love the southern draw. I'm going to take this easy.
How to know if a female coworker is trying to get my attention?
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