Neverlasting Ownership

What you have now cannot be forever.
You own something, and yet can be taken away someday,
Losing it not because of your own misdisplacement, Or its just disappeared when ever it likes.
Love is like an object.
You contribute alot for it yet sometimes you get nothing in return.
People could relatively steal it from you,
You are afraid you will lost it someday, by itself.
Anyday you lost it and you were hoping for a replacement,
It can be new but yet its not the same again.