I'm here

You wouldn't know, I'm here.
When you cry, I'm here.
When you are missing someone, I'm here.
When you sad, I'm here.
When you lonely, I'm here.
When you are bored, I'm here.
When you are busy, I'm here.
When you are tired, I'm here.
When the world turn upside down, I'm here.
Yet, you wouldn't know, I'm here.

我爱上的只是爱情的滋味吗？