You can be shattered, and then you can put yourself back together piece by piece. But what can happen over time is this: You wake up one day and realize that you have put yourself back together completely differently. That you are whole, finally, and strong - but you are now a different shape, a different size.
I think of love and marriage in the same way I do plants: We have perennials and annuals. The perennial plant blooms, goes away, and comes back. The annual blooms for just a season, and then winter arrives and takes it out for good. But it's still enriched the soil for the next flower to bloom. In the same way, no love is wasted.