Just running through town, disregarding all obstacles. Breaking through the bookshelve’d wall of Dusk, knocking him unconscious with the impact, he tells him,  
“He’s my boyfriend.”  
Smashing through the bridge, running over and through ponies, Toppling concession stands in his wake, and running up the wall of town hall, he shouts,  
“He’s my boyfriend.”  
Across the plains, and along the tracks of the train, he headbutts it dead on, throwing it off the tracks, he yells,  
“He’s my boyfriend.”  
Now in the crystal empire, smashing through buildings and ramming into the crystal heart. Out into infinity, the call,  
“He’s my boyfriend.”
 
… That was too much fun to write out.

I imagine this Spike saying that in a very nasally voice.