Fungi.

The world's largest living organism by area is the Honey Mushroom Fungus. It's indigenous to the blue mountains of Oregon. It covers the area of 1,220 football pitches. It grows underground in the shape of a twisted smile. My smile was that fungi by nature, always twisted. It snaked through my lips like an anaconda weaving across a soft pale sand. Snapping at fragments of you it could steal for a level up. That crafty thieving smile - comely shining my contentment across to you. Our dalliance was one of erstwhile but it's stayed with me ever since, haunting me with fugacious felicity. Our love a pyrrhic victory that lead to the loss of you. The vestigial chatoyant gleam of my emerald eyes ceased on the day of your departure. You watched it carefully as it faded, believing that every unwilling blink of my exhausted lids was sapping the light from beneath them. But that wasn't the case, that glimmer was for you alone and you destroyed it that day, gave it a clear pathway to nonexistence. It flitted away so softly I was unsure if it had even been there to begin with. If it wasn't for the melancholy longing it imbued within me I could have denied it, but alas it stuck with me - captivated me. 
We met at the usual place, the sun hid behind the horizon, leaving the cold sky an oppressive grey. The branches of the dead desert trees stretched across the achromic clouds like stagnant veins over wan organs. Oregon never seemed so desolate. The surrounding areas bore no witness to the crime you were there to commit. You sat me down on a mossy bench and told me it was over. I tried to find the joking nature hidden behind all the sincerity, but alas. Your stare was metallic it let nothing through, you words forming an iron gate around what was once my fruitful home. I closed my eyes. Hoping against hope that without seeing you I could keep you, desperately fawning over your fragile memory, like stroking the crooked wing of a fallen lark. Despite it's ephemeral nature there was a sheer serendipity to our entwined fates. I always relished it as a positive splicing but as I gazed at your evil, monstrous, fearful face - I knew our path was a darker one. I rose to my shaky feet, as did you. We turned to each other and before I could entirely comprehend my senses we were on the ground, my large fist colliding with your divine features. 
Each collision producing a sound not unlike that of a large work boot on wet gravel. I watched your face break, your bones cracking and deforming beneath my wrath. The squelching of your veins as they ripped open didn't faze me. My screaming queries masked the sound; How could you do this to me? How?
Hit after hit after hit I focused on but one thing, one colossal cynosure mocking me - your closed eye lids. I prayed for their opening, prayed for the pupils within them to acknowledge me, but my prayers went unheard. I saw one flicker, a scintilla of the creases surrounding it, and poised my fist - ceasing my weapon hovering above your beleaguered self. A gossamer of spittle extended from your swollen mouth to my still-balled fist. You gargled, blood cankering at the base of your throat and then rising like vengeful lava to spew over your acne-scarred cheek. It was repulsive. You were repulsive. It inured me. I wept above you my tears creating ripples in the pools of fresh blood they landed in. Slowly my body sank so my face was buried in the nape of your furiously spluttering throat. I sobbed against that lissome spot for a few moments, trying to retrieve a halcyon memory from my crazed mind in order to forget my surroundings. The scene was bucolic around us. We tarnished it with horror, and it was spreading, seeping like the blood from your wounds towards the innocent desert. To defile it with it's supreme atrocity. I had to stop it, I couldn't take it anymore. I dug out the pen knife from my damp jean pocket and flipped out the sharpest, surest blade.
And with that I breathed you in for a final time, the sickly haze of your cheap perfume puppeteering my senses, steering them towards malfunction. I brought the knife down, landing it surely between my heaving ribs. My nose accepting the metalic burn of our mingling blood amongst the petrichor aroma nuzzling beside it. Your delicate lifeless body trapped beneath my outstretched arm forever, your smile now as twisted as mine, the ghost of it dashed across the barren ground - both to inevitably seep into the thirsty dirt and join their fungal brethren.