Oh yeah... that could work. His feelings manifest in the sense that he feels oddly reassured everytime Marcone appears on the scene, to the extent that Murphy asks him if he wants to be 'rescued' by Marcone everytime.

Then at some point, his need to one-up Marcone becomes a mask for telling (bragging about) his adventures to Marcone.

And then Harry subconsciously wants Marcone to sign the Accords so doesn't do much to stop it or discourage him. Hmm...