When you are harming yourself, you're harming your mental peace. It won't be counted as self love and neither you are doing something good for others. I'll give you an example a lot of times you say yes to someone thinking as if it was your responsibility, be it with your friends, be it with your parents, get any sort of relationships
I think most of us somehow fail to prioritize ourselves, yet people say that you should be your first priority. But yeah, it's hard. It's hard prioritizing ourselves. And self love is hard. And the road towards self love is a hard one. But once you achieve it's beautiful, I'm sure. But yeah