Rather than clearly stating what you want at the start of a discussion with someone, you instead anticipate or assume what the other person would like, and then downshift your own demands before the conversation starts. Jane probably wouldn’t want to swap out my entire weekend shift, you say to yourself, so instead of asking if she can work the entire weekend for you, you ask her if she can do Saturday.
When you do this pre-compromising all the time in close relationships, you wind up never really getting what you want (though you fantasize that the other person will read your mind and offer it anyway), and instead only get watered-down versions that are “okay.” Over time, what you're left with is a watered-down life.
More than just a relaxation practice, meditation can help boost self-confidence in several ways. For one, it helps you to recognize and accept yourself. Meditation also teaches you to stop negative self-talk and disconnect from unhelpful mental chatter interfering with your confidence.
Others, especially those closest to you, may see you as subtly controlling or passive-aggressive at times — because you are. Your persona cracks a bit, and you put on subtle pressure or guilt to get your way, or you go along with something but then act in a passive-aggressive manner because your unhappiness leaks out.