Perhaps a sense of possessing needs to come before a sense of genuine sharing. Many people who give mechanically or refuse to give and share in their marriages and families may never have experience what it means to possess themselves, their own sense of identity and self-worth.
We've got everything we need right here, and everything we need is enough.
I think that the hardest thing you will ever come to understand is that you were not IN LOVE with the person that you spend years of your life with. You loved them, but you weren't in love with them...
& then the strangest clarity comes when you meet someone special...you come to understand why it didn't workout with anyone else.