She thought he was lost,travelling around the world.... aimlessly

He thought she was broken

She sought for him,hoping she could help him

Crossed the deserts and met the oceans,hoping to find a way to make her smile again

To put her broken pieces together

She never knew why he left,he never knew why she didn't smile that day

She was scared,scared of the idea of losing him

She didn't tell,and he didn't ask.

Sometimes it's better to say what you really feel/want than just being scared and ruin what might be one of the best things  you could have in your life.

That's the thing. :)