<human>: Can you succinctly summarize the text in 1-3 sentences?

First of all, sorry for my english. It is not my first language and I am not particularly good at writing either so sorry for that too.

Okay I will try to keep it short:
I am a backpacker in doing my working holiday visa in Australia. 4 months ago I met a girl in a working hostel that I really like. First I was really shy around her and didn't talk much (like always when I was back in Germany) but she made the first step and after a while we were kind of together.  
A couple of months later I saved enough money to go on a east coast trip with my buddys and she stayed at the working hostel to save money. During my trip I made plans with her to travel around Asia together and of course I was really looking forward to it. 

But 30 minutes ago I discovered on facebook that she is currently living in a sharehouse with a bunch of people for work and among those people is her ex boyfriend with whom she went to Australia (they broke up after 3 months in Australia). 
Additionally she liked a post on facebook which says something along the lines of: If a girl always has to make the first step she will eventually move on the the next guy. (Sorry cant translate it better)

Now I am really worried that they are back together and that she won't come to Asia with me. I have no idea how to handle this situation. Should I really be that worried? Should I bring it up to her? And if yes, how?
<bot>: girl and I were kind of together and want to travel Asia together but I discovered that she might be back together with her ex.