Calculus is complicated
Rocket science is complicated
Brain surgery is [rather] complicated
Making out words in English while watching the Tinah and Trora show is complicated.
Relationships however, Facebook, are NOT complicated. What's happening is one or both of you in said relationship is having relations with more than just the other.
That's not complicated at all to me. Stupid, maybe. Nasty, definitely. Complicated, not so much.