While there are a lot of positive aspects to being an expat and living somewhere new and exciting, one of the downsides has to be the fact that so many of the people you meet are so transient. Whether it’s you or them, it’s likely that one of you will not be in the same place for that long.
I’ve already seen it many times with new friends that I’ve met in Buenos Aires. You plan to hang out with them more and then, the next thing you know, they’re gone. Almost all the people I’ve met are not planning on being in Buenos Aires forever (including myself), so it does make it a bit difficult.
The good thing is that with the proliferation of social networks, you can always keep up with people easily and it gives you a lot of reasons to travel to other places too.