Cuck

Cuck Definition: A person who lets their partner have sex with other people while they are made to stay faithful and obedient. Often they let their partner do whatever they want and treat them like shit

Deep down you know you're not enough for your partner. You believed them when they said that they need to sleep with others to keep your relationship strong. That it would hurt too much for you to do the same so you had to stay faithful. That it was only sex and wouldn't change how they felt about you.

Of course now they never touch you and make fun of you with their partner. And used to run errands for their affair partner while they and your partner fuck like rabbits. But hey they still "love" you.

Lucky you cuck.