I've included a love triangle in my plot since the very beginning and had honestly never thought much of it, until I saw someone complaining on social media about how much they HATED love triangles. The situation is, my main character falls in love with this girl because she's beautiful — he likes her and they end up becoming engaged, but he doesn't really love her (hey, life is short in war, right?). But this girl is quite a bit younger than him (he's about 21, she's 17) and very naïve and in love. However, my main character is very close to his love interest's older sister. They have a much deeper connection and aren't necessarily having an affair, but there is definitely a forbidden-love-type-thing going on. Is this clichè? At this point, I've become so used to my own plot that I really can't tell anymore!