It means "how can you be so cruel".
¿Cómo puedes ser tan cruel a alguien que te ama tanto?
Can be my love
puedes volver a ser mi amigo (a) . o at end for male , a for female friend
Tú puedes ser mi prima/primo
Puede usted/puedes ser (mi) amigo = Can you (formal/informal) be (my) friend
Puede usted/puedes ser mi novia (Formal/imformal)
Puedes ser mi diablo cuando quieras (PWAYdess sair mee dee-AHblaw CWANdaw kee-AIRass)
"Tu quieres ser mi novio" is how say "will you be my boyfriend" in Spanish.
In Spanish, you can say "Puedes ser mi mentor." If you want to be more formal or polite, you might say "Usted puede ser mi mentor." Both phrases convey the idea of someone taking on a mentorship role.
You could say "¿Puedes ser mi amigo?" In this case, the English term "will you?" does not imply future action, but more like the present action of "can you".
Ser is a spanish word that means to be in english.
"ser" means "to be"