Years had passed and every night Harry would say good night in the same way, by telling Draco that with the blonde-haired man's presence he was able to stay afloat, he still missed his child but he no longer felt the overwhelming grief and desire to end it all.
And so it came to pass that Draco stayed alongside Harry through love as their relationship grew from what started as enemy's, to friends, to lovers. Until one night when Harry broke this pattern. 4 years to the day of him crawling in Draco's bed for the first time Harry did not speak these words to him. The words were like ritual to Draco and no matter how bad a day he was having he would feel much better with the raven-haired boy in his grasp and those six small words whispered into the silence of their room. Draco felt as though he could never be happier than when Harry told him those words each night but he was wrong.
The first time that Harry broke that ritual was the day that Draco found he could be even happier. Laying in bed with the boy-who-lived, the boy he loved, Harry took Draco's hands into his own. He slowly lifted his gaze until their eyes locked and spoke the words that would become the new ritual, "with you here I'm swimming." Draco smiled that one special smile that only Harry ever got to see through his Slytherin and Malfoy masks. "Marry me Draco Lucius Malfoy?" With these words Harry leant over and picked up a small box from next to the bed, rolled back so he was laying above the blonde man and opened the lid of the box to show Draco the ring. A thin silver band with Emerald surrounding a small Ruby, representing the two of them, the Slytherin holding together the Gryffindor.
There was no hesitation as Draco nodded and claimed Harry's lips in a passionate kiss, noticing that Harry was slowly placing the ring on his finger but not breaking the kiss Draco felt overcome with joy, so much so that some began to flow down his cheeks in the small beads of salty water that left their trails down the ivory flesh, carving their path in the marble skin before being wiped away by hands that did not belong to Draco. They pulled away when the need for breath got too strong but almost immediately joined their lips again.
From then until the wedding day Harry told Draco daily that he was swimming. He was alive, and happy, and loved Draco with every bone in his body, and missed his son indefinitely, and that he wouldn't change a single thing. On the morn of that happy day Harry showed Draco the wedding rings that he had made for them, gold and silver intertwined with one another and an inscription on the inside of each, 'With you here I'm staying afloat...' on Harry's while Draco's said '... and I hope you stay that way.' In Draco's eyes they couldn't be more perfect, the metals combining their Hogwarts houses while the writing being the eternal words that began their relationship.
Now, most people may have a long speech written for their vows on their wedding day but not Harry. The boy always in the limelight decided to defy convention once more with his vows on that fated day, that of his son's birthday, deciding against words that would prove to everyone how he felt, rather choosing words that showed Draco how he felt as he was the only person who mattered.
"With you here I'm flying."
Draco had a full set of vows prepared but hearing these words he rethought all he had planned to say and went for a different response, "and I'll make sure you stay that way." Onlookers may not have understood the significance of the words but they meant everything to the men stood there being wed. Both of them could not stop themselves from shedding a few tears as they exchanged the rings and kissed one another to seal the marriage.