There isn't a story to tell, because a relationship is a story you construct together and take up residence in, a story as sheltering as a house. You invent this story of how your destinies were made to entwine like porch vines, you adjust to a big view in this direction and no view in that, the doorway that you have to duck through and the window that is jammed, how who you think you are becomes a factor of who you think he is and who he thinks you are, a castle in the clouds made out of the moist air exhaled by dreamers. It's a shock to find yourself outdoors and alone again, hard to imagine that you could ever live in another house, big where this one was small, small where it was big, hard when your body has learned all the twists and turns of the staircase so that you could walk it in your sleep, hard when you have built it from scratch and called it home, hard to imagine building again. But you lit the fire that burned it down yourself.

Rebecca Solnit

“Life will break you. Nobody can protect you from that, and living alone won't either, for solitude will also break you with its yearning. You have to love. You have to feel. It is the reason you are here on earth. You are here to risk your heart. You are here to be swallowed up. And when it happens that you are broken, or betrayed, or left, or hurt, or death brushes near, let yourself sit by an apple tree and listen to the apples falling all around you in heaps, wasting their sweetness. Tell yourself you tasted as many as you could.”

― Louise Erdrich, The Painted Drum

Relationships aren't permanent and they should never be all-consuming. All-consuming relationships are a recipe for losing oneself. Relationships are fragile after all. It's far better to remember no one person can ever be our everything, which means losing someone doesn't mean we return to nothing.
Remember what it was like to love and be loved, even if it was only for a few minutes. Remember that just because something is over doesn't mean it was any less real. People aren't homes. You can't buy them or own them. You can't renovate them to be whatever you want or need according to your changing desire or expectations. You can't dump your shit all over their interior. You can't expect them to wait around to comfort your each and every insecurity. People aren't backup plans or getaways - they exist in the present. They exist and serve many roles and purposes besides being a supporting character in our stories. And we exist outside of playing a supportive character in theirs.