a man to whom a woman is engaged to be married

beloved

a person who is having a (sexual) relationship with another person

person having sexual relationship

a woman having regular sexual intercourse with a man who is not married to her; a woman owner of a dog, horse etc; a woman teacher, especially in private school; a woman in control (of a situation, a large household etc)

ladylove

a person bringing a lawsuit; a man courting a woman

person who desires another

beau

beau

(a letter, card etc sent on St Valentine's day, 14 February to) a sweetheart

person who is loved by another

woo

person having sexual relationship