After he forced himself on her in a state of drunkenness, she had started to avoid him. Later, when he stumbled upon the secret, he had stopped looking for her. They seemed to have parted right then and there.
At the time, he also thought that was the worst ending that could ever be between the both of them. However, he realized there was worse ending.
At least, he was still slightly connected to her in game.
She had stopped logging in for that period of time, but he had logged in almost daily and spent most of his time staring at her greyed-out profile picture. He would go boss hunting like usual, but when the equipment rewards burst from the defeated boss, there was no longer a pretty female avatar circling around his character like a hawk. Whenever he opened a rare chest, gone was the girl who would look over his shoulder and grab the stuff that she wanted for herself.
She had ordered him to keep quiet about that night, and he did.