God bless you so much for this brother. We mostly play the blame game most of the time. Many people automatically are ladies as being right, even after hearing explanation from the guy.

I have a friend in this too. The lady changed and gave the most ridiculous excuse ever. My friend discussed with some of his own friends and her friends, and all they could say was, my friend is faulty and I asked him to ask them why and How, they couldn't give any reason. One friend even said the lady sacrificed three years of her life (they dated three years), and I told him again to ask, how and why? Sacrificed what? What can she point to that this guy did? If he did anything, was she logical enough to give him a chance to change it at least, did she leave room for communication to at least let this guy know what he has been doing wrong?. Few days after she told me (because I asked her too what the guy did and all she could say was, I just need a break), she needed a break, she was seen with an engagement ring. 

I told him to tell those friends who accused him of causing what he didn't know to explain the logic behind that, all they could say again was that, this guy didn't fight for her. Whaaaaat?. Relationship is all about communication. If you wouldn't communicate your feeling to your partner, how do you expect him or her to make it right? 
All I could see here was, she only needed an excuse to leave my friend, and in this case, we are still looking for the excuse for her, because there was none...at least none that she spoke or communicated on, because this guy reached out, he called me to speak with her and I did, and he didn't fight for her?

Sorry this is getting too lengthy. Maybe I would convert it into a post. Hahahaha.