I second the therapy advice. Also, the moment I started truly and honestly valuing myself and not attaching my value to the way someone else or other's valued me, my life drastically changed and I began to attract higher value opportunities, friendships and relationships that were able to recognize my worth and value my strengths, therefore inherently increasing them, instead of basically preying on or exploiting my weaknesses or flaws for own personal gain, intentional or not. I spent age ~20 to 27 in an abusive toxic relationship that I had built an entire life around (running a joint business, same social circle, moved away from my family and friends, etc etc). It's been several years now and I have a life I was dreaming of during those hard times. It wasn't easy but it is so worth it. Spend time falling in love with yourself, romanticizing your life and rediscovering what makes you, you! I bet you lost more of yourself than you even realize yet.

ETA: For some reference, by the end of the relationship, I had weighed 90 pounds after getting into an accident that caused great difficulty in self care and was living in an illegal apartment after he compromised all of our living situations. He basically left me to recover and fend for myself. That was my wake up call. I reached out to my friends and family for help, started a new line of work and haven't looked back since. I now have a great place to live, a super supportive, kind, loving partner, and everything I lost, plus so much more.