I can't believe I ever thought that they loved me. I'm so embarrassed that I believed their lies. From the outside, you'd never believe I would have been with this person. I have so much going for me and they were the complete opposite which is why it hurts that they rejected me. This makes me feel more shame, to be rejected by someone like this.
I know these are just feelings and they will pass.
It's almost 2 years since my xBPDh dumped me for a really low grade replacement. For a long time I felt exactly as you have described above. However, as I have got my life back on track and realised how much I am achieving without him holding me back, I can see that he is the one who should feel shame. He should be ashamed of how badly he treated me and my kids and he should be ashamed that he did not realise he had a good wife.
I hope that one day soon, you can turn your feelings around and see that you have nothing to feel shame about - but your ex does.