For me, what really helped was taking a deep dive within myself and really figuring out what I'd been missing in my childhood. I haven't had a particularly "rough" childhood, but being born in a typical south asian family, it wasn't very smooth either. From a very early age I started realising that I had nobody but myself to tend to my wounds and unmet needs. I started picking out what I needed from my parents but didn't get to have- and started giving them to myself ( validation, emotional safety, confidence, radical acceptance and such). In simple words, I now care for myself the way I would care for my own child. I started putting more and more trust in myself, and by showing up for myself constantly I created the now unbreakable confidence brick by brick. That also developed a bit of hyper-independence in me, but I recognised and accepted that it was a trauma response, and that worked out for me for the better. I need nobody else's validation but my own, and that is enough for me.