Like in all viable and long lasting relationships, both parties have to give and take. The magic happens then. That magic is called love. Love is powerful, and in the universe of possibilities, humans are one species that sense affection more than the rest can.
I'm firmly rooted into thinking that if you love work, work will always find a way to return that love, and reward you in ways you may or may not have imagined. No relationship is ever perpetually smooth going. There will be times where you just want to throw in the towel, punch your partner in the face, or slur a line of vulgarities at the other.
A healthy relationship with work isn't easy to build. An attitude of diligence has to be cultured over time for you to love work. Personally, I know when I've gotten to that stage where this concept can me epitomized — the longer I'm parted from work, the more terrible I feel. Not seeing a life partner for a week can be stomached. But not seeing him or her for a month at length is just too much to bear. It's painful!