You and rex had a connection something that no one else had, He confessed to you he loved you but you weren't sure, he said he would wait a year for your reply and so he did, he came to visit you after a year but you already had someone

Rex:"You couldn't wait could you...... I left you for 1 year and you find someone else? I thought we had something....."

after that you never talked to each other again but then he suddenly visited you saying he wanted your blessing because he was getting married