Love/Lust

I believe the biggest difference between love and lust is the degree of difficulty.
Simply put, to lust is easy, to love is one of the most difficult things in the world.
Lust only sees the 'good' or the 'attractive,' and when things get difficult, the object of lust is discarded or moved on from. Love, however, sees and accepts all things (the 'whole love bears all things' from the Bible). It may motivate you to push the person to be better, but love doesn't leave or move on.
Love survives adversity, and sometimes, thrives because of it. I once did a wedding where I wished the bride and groom "sickness, poverty, and sadness" because it is in these testing instances that Love is tempered, and grown. The marital bond is tested, and if it is based on Love- the more enduring of the two- it will strengthen. Lust gets out.
The question the, for each of us, is will we work at love, or be lazy in lust?