It didn't happen all at once; but was more of a over before you know it type of thing. By the time he realized what had been stirring inside him all this time it was far too late to do anything about it.
He was drawn to Wolfram like a moth to a flame, maybe captivated by his hypnotizing scent or intoxicating eyes, but something made him want to bury his face deep in the nape of the mazuko's neck.
He began to crave the fire wielder when he was not around; which was a ridiculous notion to Yuuri, since Wolfram spent almost every waking moment by his king's side. Still, that was nothing compared to the cravings that occurred when the blonde prince was in his presence. Yuuri caught himself ignoring other people's questions and conversations, getting lost in memorizing every detail of his regal fiancee.
Yuuri wondered if Wolfram had noticed the change, surly he must have seen Yuuri's eyes consuming him hungrily. Yuuri had become shameless in his staring. He was so curious how one person could occupy every corner of his mind, he had never felt an obsession like this, it was almost an addiction; getting high off the air the blonde gave off. It made his mouth water, pulse race, hands shake in anticipation, excitement. He couldn't get enough, yet couldn't figure out how to get what he needed to satisfy himself. He thought endlessly of licking every inch of the blonde's skin, sinking his teeth into that perfect neck, sucking those sweet lips, Yuuri wanted to eat Wolfram alive. Just the thought made his mouth water. He was surprised how overpowering this attraction was, he couldn't even muster up the usual embarrassment he felt when thinking of his friend in a sexual way. Yuuri came to think of Wolfram as a goal, a prize he would unlock if he could only solve the puzzle before him.
What was this feeling?
Lust; his first hypothesis. But lust he could control, and it wasn't Wolfram's looks he lusted after; however impressive they may be; but more Wolfram himself. The person behind that striking face. That passionate, bold, headstrong, blaze of a person that would risk anything for Yuuri; who already had. He lusted for Wolfram's soul.
It became more undeniable, the emotion he had avoided for so long. However, the more it pressed into him, threatening to bust the seems of his mind, the more tolerable it became. In fact, just the idea made his heart flutter. The secretiveness did not excite Yuuri and he wanted to stop every person he walked past to tell them all about this new feeling he was experiencing for the first time. No other feeling compared to it, and Yuuri became worried that his over attraction was more one sided that he had originally thought. Surely Wolfram could not have let himself slip into this blatant slick of emotion like his naive fiancee. He worried his emotions were so strong Wolfram might not every be able to return them with the same blind vigor.
He wondered if Wolfram would believe him. He had denied it for so long that he had been able to watch the wall Wolfram had put up to protect himself build brick by brick.
He felt incredibly guilty for the pain he had put his dedicated fiancee through, but hope still clung to his heart.