SAN DIEGO—Insisting you’ll never be truly happy until you found the superior partner you’re more than entitled to, a little voice in the back of your mind reported Tuesday that you deserve much better than the person you’re dating. “Why is someone like you settling for someone like this?” said the nagging voice, mounting an increasingly convincing argument for you to walk away and find someone who is actually worthy of you. “You’re amazing, and you know it. You could be out there with anybody. Deep down you realize you’re wasting the prime of your life with the wrong person. So what are you waiting for?” At press time, the same little voice reported that you just threw away the best thing you ever had.