<human>: Me and my ex-girlfriend (now FWB) are from different countries and we meet oversea where we study. 

Our relationship last almost 2 years, we did broke up once for few months for what I did (flirting with her friend). After getting back together I change myself for the better although it not the best but I am commit to this girl no more talking or flirting with anyone.

Few months ago she need to go to Australia for her sister engagement photoshoot, this is where thing goes south (duh)

So she met some Chinese guy who study there and go out with him
for one day after that they exchange contact Facebook/Whatsapp.

She told me few days later and we fought a lot about this. Few months pass we still together but I know her feeling for him is growing everyday and decreasing everyday for me. She say it a new thing so she excited about.

Few weeks ago she ask me to break up and we did, but we still FWB I still stay at her place and go out and spend time with her almost 24/7

But now she said the guy is coming to visit for 2 days. She want to go stay with him at his hotel. I feel very hurt by all this. The more she happy about him the more I feel hurt, all the status, tweet that about him make me feel great pain. 

I just felt betrayed and unfair that I'm not the one who respect our relationship, I'm not the one who go out with other guy while still in a relationship. But I'm the one who get short end of everything that come from this, I'm the one who get hurt while she the one who did wrong but are clearly have everything going well for her and happy.

I don't know what to do, just ranting my thought.

Can you condense the text into a few key points?
<bot>: I did wrong I get dumped, I change myself we get back togeter, she met new guy she dump me, i'm sad and feel helpless.