Thats entirely his fault for non consensually making someone dependent on his pheromones. He physically CANNOT function without them. His dream was on the line so I say what juhyeok has done is a consequence of suah's inappropriate action.
he was omega so even without su-ah his dreams is still nothing, both of them are at fault but him being dependent to su-ah is his choice cause it keeps his omega trait from acting up. Without su-ah he would already be impregnate by someone else cause he only think about his dreams and didn't even consider the danger he could get into during his heat.
Su-ah did the right thing for stopping himself going back cause that omega would never think of him more than a cum giver tf.