Filling your own glass first
This is something I struggle with daily. I am by nature a people person and want everyone around me to be happy. As I get older and wiser I have come to the harsh reality that most people do not function the same way. Most people put themselves first and the more I accommodate the worse I feel about the effect it has on me.
Basically, everything comes before me, The kids, husband, job, dog, everything. Trying my best to ensure no hardship and trouble for them pushes their issues on me. I bear the burden and it just makes me a shitty person. I start resenting people around me for not putting in the same effort. Not feeling the same downfalls. It's because I am filling their glass and mine is empty. People pleasing is a personality trait and is not the best version of you.
Learning to say no. Learning to let go of people who are not adding to my life. And learning that not everyone is going to like you, and that's ok! I have been able to change this in my life. Staying true to myself and not accommodating other people's issues. This is your life, not someone else's. They don't deserve to judge, comment, or make notes on how you live.
What I found is that when I stopped caring so much that those people I wanted to start caring for either were eliminated from my life or were able to appreciate me for me. Give yourself a chance to be yourself and fill your own glass right to the top!