A broken relationship is never what she wanted, a love so strong that even that they know how bad they are for each other, they can't leave each others side. Everywhere one went, the other followed... They were inseparable.
They met when they were sixteen and bonded over their hate for life. Two unhappy teenagers skipping school to get high in the park, seemed harmless at the time but soon became damaging. As their love grew stronger, so did their love for anything that gave them a high... A boost into the clouds. Unfortunately the boost didn't last long, and when they came crashing down the arguments began. 
They screamed at each other, smashing everything they had in sight. What was love, quickly became hate in a matter of moments but once the needle jabbed their arm and filled their veins with poison, the love reappeared again. Who did they love? Each other or the drug? What was the difference between them anyway? Love is like a drug, you're happy and floating on a cloud when you have it but the second the cloud is torn away from under them, they come crashing down and hit the ground hard. 
At least they knew that they drug would always be there, the love may not. They could pay for the drug and float on a constant cloud, a cloud they floated on together unaware of the world beneath them. 
This had gone on for so long, that it was just a way of life for them. They knew nothing other than this toxic relationship that they had managed to find themselves locked in, needing each other constantly.