Sentence:  I imagined him as the kind of boy who knows girls are equals; the teen with female friends as well as male; then a kind man, a good man, the kind of man who knows better than to be a <WSD>heartbreaker</WSD>, despite his looks. 
Meaning of the word marked with <WSD> tags:  Someone, usually attractive, who flirts with or otherwise enamours a person, but does not reciprocate their love.