Lovable, a.
Having qualities that excite, or are fitted to excite, love; worthy of love. Elaine the fair, Elaine the lovable, Elaine, the lily maid of Astolat. Tennyson.
Shades of meaning
Fernald has no entry of its own for lovable; he lists it under amiable.
Where he writes about it:
Amiable combines the senses of lovable or lovely and loving; the amiable character has ready affection and kindliness for others, with the qualities that are adapted to win their love; amiable is a higher and stronger word than good-natured or agreeable. — from amiable
A sweet disposition is very sure to be amiable, the loving heart bringing out all that is lovable and lovely in character. — from amiable