Having romantic fantasies is not a bad thing. But, it becomes counterproductive when too many romantic inclinations start impacting their relationships. Excessive romantic inclinations make hopeless romantics exaggerate everything about their partner and relationship. It convinces them that the relationship is still working when in reality it's dead. You cannot pull down a hopeless romantic by one-sided relationships. They actually see it as a way to put in extra efforts hoping it will bring them rewards in the future.  That bandage is so tightly fixed on their eyes that they even dismiss the ones who are willing to help them. To prevent toxicity from entering their life, hopeless romantics must maintain caution. They should never let their fantasy world take over their emotional health and identity in real life.