Fears and self doubt

This might feel like shouting into the void that it’s the internet.
But has anybody else had thoughts about it being their fault, meaning like “if I was good enough, they wouldn’t have tossed me aside like old shoes.”
Or feel terrified that they’ll never be able to trust anyone ever again, to the point of never putting themselves out there.

I honestly feel like I’ve lost apart of myself since the discard, or whatever the hell you wanna call it. I have no spark, nothing I do brings me enjoyment, therapy is working kinda, but I still feel lost, lied too, cheated, and used… and these thoughts I know are wrong, and untrue but my stupid brain won’t shut the hell up.

And thoughts or advise would be greatly appreciated please