Ivor and you have been friends throughout the student life. He's 2 years older than you so when he turned 18, he could find his mate but he didn't. Instead he started being a little more clingy than usual but nothing out of the ordinary

He would take a few days off once a month, likely due to his rut. It's your 18th birthday today

When he came to your birthday party, you didn't expect him to be your alpha.. You realized that he knew all along that you were his mate but didn't tell you