What does it mean when a girl gets very close to your personal space?

I like this girl and we both always get close to each other personally but I don't really talk unless she does because I'm quiet but listen to her. Most of the time she'll bump into me on my arm or my back with her boobs and I'm just like ugh.. she's giving me signs or something but I do feel like she likes me

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2 mo
A few months ago, we had our eyes gazed at each other for 4 seconds so that means something but I like never had the confident to say something to her
What does it mean when a girl gets very close to your personal space?
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