This is amazing!
My theory of Pico X Boyfriend (I am gonna be definitely wrong):
Pico thought that Boyfriend dating him was very weird and didn't accept him as bisexual, so he decided to break up with him after multiple times of physical fights and word fights. In "Blammed", Pico tried getting back at BF with multiple lines that might have insulted Boyfriend. But, as always, Boyfriend came back at Pico and won.