Sometimes when we end up separating, we are able to see our life more clearly & realize that the life we were living isn't what we want for ourselves. She has pretty much given you her answer by telling you that she has changed how she feels.....or she may not have really felt anything in the first place.....hard to really tell even if they say they do.

I know that I was the one that left my H after 33 years of a bad marriage & the longer I was away, the more peaceful I felt & the more I knew that there was no way I was ever going to go back or have anything to do with him any longer. The longer we are away the more clearly we do see our own lives. I never had nor do I have anyone during these 7 years....so my leaving was to be alone, not to go to someone else.....& I totally prefer being alone to the marriage I had.....but it sounds like there may be someone else in her life that she is not willing to bring into the picture right now......whether that was the cause of her actions toward you or whether she really decided that the marriage with you wasn't what she wanted......one thing for sure....your move long distance to another country didn't do your marriage any good.....but at this point even if you were to move back....I wouldn't count on it making any difference....but that might be worth a try for your son....at least you could live closer & be able to see him more often even if it ends up in divorce.