I had some successful flirting with a girl at work. Now she's in her home country maybe coming back. How or should I still pursue at all?

[Rejo]

I was working with this girl for some weeks. I flirted with her and though at the beginning, she didn't show much interest, then I passed some tests, but I made a mistake walking away when I misinterpreted that she had lost interest and she was really chasing me. I can't get over because I like her and I really want to get to know her

Now she's in her home country finishing her studies, planning to maybe come back to where I live. She's got some friends in the company. I'm not sure who they are, but I can find them if I want. There are people who speak her language and I can find these other girls to ask for her number if she's agreed to talk to me on the phone. I'm not sure whether I should do it or not, since some friend told me, I'd be showing neediness and that may look creepy and make her freak out.

I know she's busy back home at the time. There's a good chance that she's coming back. I want to make up for walking away because I like her, and I don't want to run after her like crazy in case she comes back to my company. I can't forget her and I want to know if I still have a chance.

I'm probably not staying working there forever and she may not come back directly to my workplace. Like I said I don't want to go running after her deseperately if I see her, so I don't look dumb, creepy or weak. So I'm wondering if I should try to get her number to talk to her and  take my last chance.

I like her and I feel bad at not noticing that she was "following" me the last day I saw her. I feel like I lost a great chance of getting a gf and I want to take the last chance.

Now... about what I'm saying: is it that creepy/needy/weak in any way or proper? Should I still do these inquiries or is it better to follow my friend's advice to let her go? I don't want to get humilliated or look like a creep at my workplace, so I'd appreciate any advice.

 

[Wiseman2]

See if she will accept a friend request on social media.  Do not just contact her out of the blue.

Listen to your friends and date local available women.

[MissCanuck]

1 hour ago, Rejo said:

I flirted with her and though at the beginning, she didn't show much interest, then I passed some tests, but I made a mistake walking away when I misinterpreted that she had lost interest and she was really chasing me.

What sort of tests? 

And can you elaborate on how she was chasing you? 

1 hour ago, Wiseman2 said:

See if she will accept a friend request on social media.  Do not just contact her out of the blue.

I agree with this, OP. Start here. See what happens. 

[Kwothe28]

You know her, so social media should be enough "low" tier for inquiry and to make contact again. Phone number out of the blue by somebody else would maybe be way too huge deal. Its way too personal and maybe you should ask her for that and not some random people.