What would you do if you suspected someone was intentionally avoiding you?

i'm pretty sure this girl is avoiding me intentionally as we live in the same area and i never see her anywhere else but this restaurant we both go to.

and i'm not entirely sure why either as i though we got along and i've seen girls she's friends with at other places here but never her.

i've never really been able to get any answers out of her as to why this has been occuring i asked once last year and she got really weird with me about it

What would you do if you suspected someone was intentionally avoiding you?
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