LOL, pretty sure George isn't involved in this project.
I just figured they love in each other what they feel insecure about in themselves. Any writer worth her salt can throw in a few lines during an action sequence (like when Avengers were fighting in Sokovia forest at the beginning of AoU):
(Fighting next to Scarlett Witch, Vision stops enemy with exact use of powers, careful not to harm)
Scarlett: That's what I love about you. (Action beat) Your humanity - even toward those who would destroy you. (Stops something big from hitting them) Where I come from, the powerful bully and exploit the weak.
Vision: (Sees Scarlett break enemys' fall) I marvel at your compassion. (Focused energy beam stops oncoming enemy vehicles) Suffering embitters so many, yet it informs a deeper empathy in you.
Scarlett: (with humor) Suffering was that Crème Brûlée you made. (Advancing on the enemy fortress together)
Vision: I'm still honing my culinary skills.