O.E.
lufu "love, affection, friendliness," from P.Gmc.
*lubo (cf. O.Fris.
liaf, Ger.
lieb, Goth.
liufs "dear, beloved;" not found elsewhere as a noun, except O.H.G.
luba, Ger.
Liebe), from PIE
*leubh- "to care, desire, love" (cf. L.
lubet, later
libet "pleases;" Skt.
lubhyati "desires;" O.C.S.
l'ubu "dear, beloved;" Lith.
liaupse "song of praise"). Meaning "a beloved person" is from c.1225. The sense "no score" (in tennis, etc.) is 1742, from the notion of "playing for love," i.e. "for nothing" (1678).
Love-letter is attested from c.1240;
love-song from c.1310. To be
in love with (someone) is from 1508.
Love life "one's collective amorous activities" is from 1919, originally a term in psychological jargon. Phrase
make love is attested from 1580 in the sense "pay amorous attention to;" as a euphemism for "have sex," it is attested from c.1950.
Love child "child born out of wedlock," first attested 1805, from earlier
love brat (17c.).
Lovesick is attested from 1530;
lovelorn from 1634 (see
lose). Phrase
for love or money "for anything" is attested from 1590. To
fall in love is attested from 1423. The phrase
no love lost (between two people) is ambiguous and was used 17c. in ref. to two who love each other well (c.1640) as well as two who have no love for each other (1622).
[luhv] 
noun, verb, loved, lov⋅ing.
) a personification of sexual affection, as Eros or Cupid.