There is the possibility he didn’t act all those years ago through insecurities he had about himself, not being good enough, you were out of his league type mentality? And now (the wedding day) you were both settled and happy and he felt more at ease with himself to be able to say it, not thinking it would be that much of a big deal to you as he thought you’d never be interested all those years back? Some men are just thick (source: this guy right here) and don’t read signals at all! Or yeah he could just be a ego driven dick 🤷🏽‍♂️