Chloe was gone when Clark woke up that morning. How the hell that happened he doesn't know, but what he does know is likely where she went. And there isn't anything he can do about that; it's between her and Riley now. That doesn't mean Clark isn't headed to the same place.

It's just not after Chloe.

He does his level best to ignore the heartbeat that rings in his ears the second he enters Milliways and focusses until he can hear another one. And then he heads toward it.