A lover boy can be called by various terms, depending on the context and the cultural norms. Here are some possible options:

Casanova – refers to a man who is charming, flirtatious, and skilled at seducing women.
Lothario – refers to a man who is notorious for his seductive skills and often has multiple love interests.
Romeo – refers to a man who is romantic and passionate in his pursuit of love.
Don Juan – refers to a man who is a master of seduction and has a long history of romantic conquests.
Heartthrob – refers to a man who is considered attractive and desirable by many women.
Ladies’ man – refers to a man who is popular with women and often has many female friends.
Charmer – refers to a man who is able to make others feel special and appreciated with his words and actions.