Yes, I want to please at all costs. I want to see someone else happy and I never want to offend. So I will hurt myself rather than hurt others.
Being strong and setting boundaries, feels very selfish. Selfish, is what I was accused of so many times, that it feels like the ultimate sin.
Plus there are times when I did put myself first, looked after myself, was accused of being selfish over and over because I cut myself off from my abusive family and then my sister killed herself. That is a the ultimate punishment, putting myself before others, led to her death.
The fact that I am told, that I did the right thing, does not overcome that selfish, wrong feeling and the feeling that, when I put myself first, I will be punished for it, someone else gets hurt.
That makes it very very hard to put yourself first.