True Love

True love lasts forever?
But nothing last forever
So our love cannot be true
Or forever just doesn't last.

Wrote that ages ago but only now does it really have full meaning.
I've realised that every relationship I've been brought up to see as being right, as being true, hasn't worked.
Marriage seems pointless from my experiences and everything considered 'love' around me, doesn't last.
My parents are divorced, and so are their parents. And in a lot of 'working' marriages i know of, the people are both so unfaithful. It's all slowly losing meaning.
This concept of true love is foreign to me.