This was Jonah's first time being at a wedding and it was the only experience he would get before his own. He needed to pay attention and take mental notes.
Eden may be the one mostly in charge of the wedding planning but she would probably want his input at some point. She usually did about whatever she was doing; that was how they had always worked.
When he saw her come down the aisle, his heart nearly stopped. What was it going to be like when he saw her coming down the aisle toward him wearing a wedding dress? He very well might spontaneously combust.
The ceremony was short and sweet because neither Ezra nor Nadia were terribly formal people. They had each written their own vows too, which added to the romance of the moment. Maybe he and Eden should do that when the time came.