love triangle
US /ˈlʌv ˌtraɪ.æŋ.ɡəl/
UK /ˈlʌv ˌtraɪ.æŋ.ɡəl/

1.
triángulo amoroso
a romantic relationship involving three people, often with one person being the object of affection for two others, or two people being in love with a third, leading to conflict or drama
:
•
The movie's plot revolved around a classic love triangle.
La trama de la película giraba en torno a un clásico triángulo amoroso.
•
She found herself caught in a complicated love triangle between two close friends.
Se encontró atrapada en un complicado triángulo amoroso entre dos amigos cercanos.