I Don't Understand (Surge X Sapphire)

I don't understand

Sapphire and Surge are quietly sat in Sapphire's garden as the young female hedgehog tends to her forget-me-not flowers on her knees. Wiping a strand of hair behind an ear she hears Surge sigh from behind her where he was sat leaning agaisnt her garden fence.
"Some mortals are so annoying" He grunts shifting a little. He takes Sapphire's silence as a chance to continue his rant. "There was one trespassing on the company's territory today trying to 'rescue' his little brother. Don't they understand? It is what has to be done" Surge stares at the forget-me-nots Sapphire was tending to watching as she gently waters them. "Their time was up" He looks up to the sky as if the clouds were going to answer his question. "Why can't some mortals understand that?" At his words Sapphire turn to face her partner and smiles in sympathy before she too lets out a sigh.
"Because they understand that life is precious- they don't want to let it go just yet" Surge grunts and turns to face her in annoyance.
"Well, can't they wait? They'll all just wind up in the same way-"
"Waiting can sometimes feel like death itself, Surge" Sapphire lectures going back to tending her flowers. Surge pauses and looks at Sapphire blankly.
"...I don't understand" He whispers faultering. Sapphire stops once again and closes her eyes.
"...I know" Surge continues to stare at Sapphire waiting for a better explainaton. She then suddenly sits up straight as an idea hits her. "How about this, imagine- what if I died, and left you behind?" Surge was taken aback by her words. They were like knives cutting at him.
"...heh...heheh...thats IMPOSSIBLE Sapph! I would never let you die, even then i'll-"
"What if I went away- to a place you can't reach, you can't find me" The knives from her words were cutting deeper into Surge. "And we never could see each other again?" He turns back around to look at Sapphire he saw she was looking down sadly as if she too was cutting herslef with her words.
"...why would you do that?" Surge asks uncertainty clear in his voice. He was starting to become scared, sad even...angry at the thought.
"I had no choice" Sapphire says shrugging.
"What do you MEAN you had no choice?" Surge darkly asked as his hands turned into fists. Sapphire turns her head slightly to catch sight of him not meeting his eyes.
"Someone took me away" Surge stays silent not wanting to respond, he didn't know what to say, do, act...he just sat there. "And you won't ever know when you'll see me again- if you even will- and it feels like you can spend an eternity waiting, right?" Sapphire continues purposely not facing him.
"Sapphire-" Surge whispers reaching out to her not wanting to let her slip out of his life. But she was too far away.
"That uncertainty is what mortals feel, and if they loved someone enough...some would even fight though to search and-"
"Sapphire-" Surge says a little more loudly his voice cracking in the process as if he was about to cry. He didn't want this. He didn't want Sapphire to go away. Why would she? He knows shes just using an example for him to understand but he didn't, he just would feel...sad? Lonely? What is this feeling?
"Wouldn't you search, Surge?" Sapphire questions softly as she fiddles with the stem on her flowers. "What would you give up?" Sapphire only heard silence and sighs once again. "Well, it's just and example, anyway" Surge couldn't say anything. He didn't know what to say. He stands up and holds up his hand before disappearing into thin air. Sapphire continues "I don''t really expect...you to really understand." Sapphire turns to find he was already gone. She stares at the space where he was sat for a while before once again watering her flowers and humming a tune.

Meanwhile Surge is outside of her house listening to her melody. His face is hidden by the shadows but a frown is certainly visable on his face.
"...I just- I don't understand"