Never knew?

& I never knew; How much you really mean to me
I never knew how much i cared, until the one day you weren't there.
Now I'm here on my own,
Sitting here all alone.
Waiting for that one guy to come and sweep me off my feet; But that one guy did come, I just didn't; realize it.
I never knew How much you mean to me, now I'm here to tell you how much you do.
I cant go to asleep knowing your not here, I cry myself to sleep with just one tear.
You mean the world to me, I'm just sorry i was to late.