Full Idea
Desire and love are the same thing, save that by desire we always signify the absence of the object, by love most commonly the presence of the same.
Gist of Idea
Desire and love are the same, but in the desire the object is absent, and in love it is present
Source
Thomas Hobbes (Leviathan [1651], 1.06)
Book Reference
Hobbes,Thomas: 'Leviathan', ed/tr. Macpherson,C.B. [Penguin 1981], p.119
A Reaction
Implausible reductivism from Hobbes. Plenty of counterexamples to this. You work it out!