We feel unloved when our partners do things that are inconsiderate. In truth everyone needs love, we long for it, we dream for, and we fall for it. But love always fades out without motivation. Couples also feel resentment because of lack of sensitivity by their partner, in other words lack of encouragement. This most time often leads to the relationship hanging by a thread. For proper motivation, understanding of one's partner is necessary, for example there are couples who feel motivated by words rather than gifts. Study and know what soothes your partner, do not assume. The whole essence of any relationship is to show support especially in difficult times, and this when the skills of motivation is needed most.
What to do:
Look beyond the negative, see the positive.
Encourage in small steps
Motivation is a good way of building relationship, try and see what difference it makes.