For the longest time, you've made excuses for people. You've stayed quiet while they continued treating you badly, while they took you for granted and were comfortable making you pick up the slack for them. A part of you does it to avoid confrontation - it's not standing up for yourself that you're afraid of, but it's letting someone know that their actions hurt you. You think that would make them unhappy, and so you choose silence over speaking the truth. In your concern to protect them, you compromise yourself - you play a role in letting them take advantage of your kindness. It's difficult for you, because you've always been okay taking caring of other people - you don't see it as a burden anymore - but the truth is that you're too comfortable with it. You have to let people know that you're not going to clean up their mess, or stay quiet when they inconvenience your life - you have to, for your own sake, stop being the good one, the understanding, the one who will tolerate anything, and gather the courage to be the one who says no and doesn't allow others to manipulate their way into your life.