Cupid might be a good idea.
Play Cupid: to try to arrange for two people to fall in love.
He was playing cupid when he introduced John to Sheila.
According to ldoce:
a character based on the Roman god of sexual love, who was the son of Venus. Cupid is usually shown in pictures as a young boy with wings, holding a bow and arrow . His picture is often used on Valentine card s to represent love. People sometimes say that they have been hit by Cupid's arrow when they have started to have romantic feelings for someone.
Accroding to MSN Dictionary:
Synonyms for matchmaker: marriage broker, go-between, fixer, intermediary, cupid