Cris felt the frequency of his heart being messed up. He regretted bringing that up. Kelvin didn't need to know about that, especially not right now.
Cris was determined from the very beginning that he would never let Kelvin discover or know anything about his secrets. In fact, telling him the truth had never been an option. Telling anyone who didn't already know had never been an option. But now, he started to feel guilty that he was hiding such a secret from Kelvin and that feeling of not wanting to hide anything from him was starting to haunt him.
When Kelvin pulled away from him and looked into his eyes, Cris felt his heart skip a beat. He never thought about doing this before, because it was too much of a burden for anyone to bear but now it seemed like having feelings for someone
