A friend and I were talking about a struggle we grappled with when our younger sisters got engaged. The brain is a pattern-finding machine. It always wants to find a reason for why things happen. So when you fully expected to be the one to get engaged first, your brain wants to know why you weren’t. And it starts to pull up an array of possibilities that mostly fall under two categories: I did something wrong. She did something right. Otherwise there might be…no reason? That’s uncomfortable. So back your brain goes, ruminating on what you did wrong and what she did right.