In a relationship, it's not difficult to use your brain over the heart. If you find yourself capable of getting involved with someone because you use your brain, it means one thing, you aren't in love with the person. Because when you love someone, it's almost impossible to control your heart and tell it to let the mind handle the relationship. And the same is also true that when you can't use your brain because the heart rules over, it means that you are definitely, positively in love. So good luck to both your brain and heart.