"a marked exhibition of mutual love; an interview between lovers; a pictured, written, or acted representation of such an interview" [Century Dictionary], by 1630s, from love (n.) + scene. 

"child born out of wedlock, child of illicit love," 1798, from love (n.) + child. Compare German Liebeskind. Earlier was love brat (17c.).

"courtship," mid-15c.; see love (n.) + make (v.). Phrase make love is attested from 1570s in the sense "pay amorous attention to;" as a euphemism for "have sex," it is attested from c. 1950.

"amorous song," late 14c., earlier "song of praise" (Tech me, iesu, þi loue song); in late Old English, "hymn," from love (n.) + song (n.).

"the instinct or virtue which directs a person's actions to the promotion of his own welfare," 1560s; see self- + love (n.). In early use especially "love of oneself, particularity to oneself."

"love, friendship," also "sexual love," late 14c., verbal noun from love (v.).

also love-sick, "languishing with amorous desire," 1520s, from love (n.) + sick (adj.). Related: Lovesickness.

affectionate, dialectal, or colloquial spelling of love (noun and verb), attested from 1825.

affectionate pet name, 1731, from love (n.) + -y (3). Extended form lovey-dovey attested from 1819 (n.), 1847 as an adjective.

also love-struck, by 1762, from love (n.) + struck, from strike (v.). Love-stricken is attested from 1805.