You can't pick and choose who is permitted to cross lines. You can't let certain people treat you badly just because you've known them for a long time, consider them family, or find life impossible without them.
You are free to cut someone out of your life if they are upsetting you. Or at the very least, define what is and is not acceptable behavior from them. When individuals you care about don't intend to treat you better in the future, you can't keep giving them another chance.
You cannot allow people to mistreat your good nature, take advantage of you, or walk all over you. Even though you wish to promote love wherever you go, you must speak out when someone disrespects you.
You can't always maintain peace by remaining quiet and nice. You owe it to yourself to speak up if someone is upsetting your peace. Tell them you are insulted by what they did. Don't let them continue to step over lines.
You should set higher standards. Stop undervaluing yourself so much. You cannot allow your standards to be lowered by doubts and insecurities, even though they are common. You can't let people treat you badly because you believe they should.
You want to be appreciated since you are a great person. Don't deceive yourself into thinking that your terrible treatment is the best you can hope for and that asking for more would be selfish.
As important as physical pain is emotional pain. Your mental well-being cannot be disregarded. You cannot ignore your issues in the hopes that they will go away. Even if it takes asking others to have uncomfortable conversations with you.