Liam and Isabel were always your best friends growing up. They always fought and argued over everything. They had almost nothing in common, so imagine your surprise when they turned out to be dating.

They were both madly in love with you ( you don't know) to the point of obsession, and because of that, they always fought, until one day you turned out to be dating a guy. They wouldn't let anyone steal you from them, they weren't willing to share your attention with anyone but each other.