20 years and 10 months since they started going steady by some miracle that he thanks Merlin for every day.
He had been dreaming of this since his youth. Not just a pretty girl he could call his own but her. Hermione Granger was his. Not in some "she belongs to me way" but in a lovely way. And even though he would never admit it the very thought made his heart sing.
When he would wake up in the morning and she would be there he couldn't help but thank Merlin. But how could you not when Hermione was your girlfriend? She was beautiful, intelligent, brave (stubbornly so), and funny. He still loved her. Just the same as always had. And she was his by some miracle.