He honestly couldn't remember when he stopped thinking of Zygarde as just a friend. All he knew was that it hurt..a lot. He knew that the other Pokemon trusted him a lot, especially after he had saved him from such an awful situation. He shouldn't be feeling this way. He shouldn't feel this way towards the friend he cherished so much. So he didn't say anything. He let it fester, because that was better than ruining the friendship he loved so much...so he would let it die with him.