A smile from you can bring happiness to anyone, even if they don’t like you. But a smile can also ingratiate you with someone, help you succeed, allow people to like you more, improve your love life and interpersonal relationships, etc. Most of all, a smile on your face can and will make you happier.
Happiness and misery depend as much on temperament as they do on fortune, so try cultivating a better outlook and disposition. Your chances for happiness in life and love will be greatly enhanced.