Desire and love

No way. Love and desire are two very different emotions. You can fancy someone without loving them, just as you can love someone you don't fancy. Your sexual desire can change in an instant because of medical, psychological, relationship, family and many other minor problems - fatigue for example. 

In a stable relationship every couple experiences lack of desire from time to time - it's inevitable. You need to accept this and work at finding out why you're having problems. Don't forget that just because you're having problems in the bedroom department, it doesn't mean you don't still love each other. Don't throw what you have away when it's so easy to sort out.