Is it Us or Just Me?

When we look at each other I am happy,
When you cry you make me cry,
When you laugh I laugh with you,
When you dream I dream of you,
When you walk my shadow walks with you,
When people play I cheer only for you,

When I breathe I breath you perfume,
If I sing I sing for you.

All this happens because of you.
Do you know what this means?
It means that I love you.