Checking a girl our but no idea if she likes me back?

So at a casino.. I see a girl heading around tables towards me.. and I look directly into her eyes, she notices and also looks.. then looks elsewhere for a bit.. I keep my gaze at her.. and she looks again and walks by.. with her friends and a husband (I assume).. she sits far but she has line of sight.. she catches me again looking at her.. I feel here she mentions it to her friend and the guy she's also with.. they look towards me a few times.. I look at times but focus on the game.. they eventually walk by me.. and the guy just looks at me.. whilst the girl (I like) walks by my desk.

What do I take from this?

Checking a girl our but no idea if she likes me back?
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