<human>: Could you distill the essence of the text into 1-3 sentences?

I had gf for a short time.  Early in the relationship she told me that an ex was visiting and he would be staying with her.
I protested and the situation changed to him staying with her friend.  
We live in a foreign country that is very far away.  Cancelling the trip was out of the question and she wanted to speak to him to clear up some things.  It was a bad break up.  Apparently she was supposed to go to his wedding that was called off and they ended up making their friendship into a fling/relationship while she visited from a different country.  This ended when the guy ended up getting back together with his fiance not long after she left.  However, the marriage/relationship didn't work out.  Strange, no?

Big red flag.  To make a long story short - I found out through a wall post on facebook that the guy and her were hanging out well past 3AM together.  This was a huge flag and signaled the end of the relationship.  There were other things but this was major.  Some lite lying and not being as considerate as I would like a GF to be in general.

I ended the relationship soon after.
However, I live in a very small foreigner community.  I've noticed that all of her friends have been extremely cold to me.  In addition, others that have moved to this area have at first been kind to me then very cold.  I've found that those being cold to me have heard some variation of a rumor that I wasn't a great guy and I broke up with her in a harsh way or something.

How do I go about having a social life when I'm being outcast in such a way?

I will no doubt see my ex again.  I'm not a social butterfly but I do like to have friends and socialize.
<bot>: Break up in a small community makes me into an outcast.  How do I go about socializing in this situation?