Hi Geneva,
I'm the American student who just arrived this week. As you know my lab is trying start a collaboration effort with some folks at your fine and I've been chosen as the go-between. I would love to stay. If the folks here like me and my lab likes them back, I will! Although - I want to be honest at the start of every relationship - we can't be exclusive because I will have to travel between the US and here.
I know, I know, we barely know each other and its crazy to start planning years ahead. But I could totally see you in my life a year from now. Yes, I know, I hope the circumstances work out, but it's out of our hands now. Let's enjoy our time together, whatever may happen.
Yang