When we look around us, we can see that people who are not in a relationship are unhappy. They are not unhappy because they are not related. They are not open to the relationship because they are already unhappy. An unhappy person does not want a relationship.
Happy people are open to anything. They feel ready to go for a relationship, a marriage... They feel ready to start a good family. Their energies are high. Their motivation is high. One feels better when they are with someone they truly love and feel loved.