loving adj.

Old English lufian "to feel love for, cherish, show love to; delight in, approve," from Proto-Germanic *lubojanan (source also of Old High German lubon, German lieben), a verb from the root of love (n.). Weakened sense of "like" attested by c. 1200. Intransitive sense "be in love, have a passionate attachment" is from mid-13c. To love (someone) up "make out with" is from 1921. To love and leave is from 1885.

This truth came borne with bier and pall,

I felt it, when I sorrow'd most,

'Tis better to have loved and lost,

Than never to have loved at all —

[Tennyson, "In Memoriam"]

1730, from ever + loving. As a mere intensifier from 1930s.