Friend going back to her home country soon, do I tell her how I really feel or stay friends?

A month ago I met an amazing girl from S. Korea, we got along well, she speaks almost fluent English, we've hung out a bunch of times since and in 2 weeks she's leaving to spend a few weeks with her friend (girl) who lives in DC, then she goes back to her family in S. Korea. When we first met we spoke about what we're both looking for in a relationship, I told her that for me I don't believe in rushing into dating, it takes to get to know the complete person and if it turns into dating, it has more of a chance since you're already comfortable with the person, you have a ton of things already in common. She agreed with me, she's met guys who just wanted to hookup with her and she hates guys like that. So even though we're just hanging out as friends, the more I get to know her..the more interested I become, now I can't stop thinking of her. She says she wants to return soon, maybe even live here but who knows when that'll be. On one hand, I want to open up and tell her how I really feel, but on the other, I don't want to start up a relationship when she's going back home soon. I have a feeling she likes me too..but maybe we should just stay friends until she returns. So confused, any advice would be great