Tears and anger of a betrayed man

“Hello…

I loved a girl; I was ready to marry her. Our relationship lasted five years. We promised ourselves everything. We were only waiting for the moment to come to formalize our union. I loved her, I saved her for marriage. But now all these projects fell through. She decided to separate from me, which I never imagined. The problem is that I'm not quite sure what I did. I do not know what to do. For 4 years I promised him love and loyalty. I didn't even have time to look at another girl. Now I am forced to face this sad reality - she will not be the wife of my children. I am really distraught.

Thanks in advance for your advice!”