My fwb got married

Guy I was fwbs for about a year got married today. I had no idea he was in a relationship let alone engaged today. I have him on Instagram and Snapchat and haven’t ever seen a trace of a gf or else I wouldn’t have talked to him. I’d see him like once every 4 months. He’d come to my state usually and sometimes I’d see him in his as we’re both military. I will say we were friends too so you can imagine how annoyed and upset I am about this because he knew I had been cheated on. An old mutual friend attended his wedding and posted it so that’s how I saw it. Apparently they’d been dating 5 years and they were long distance for 2 years (according to my friend that’s in the same unit as him). I had no idea and I’m kinda wondering if I should say anything to his wife or just mind my business. He’s since been blocked but I just feel like an idiot.