How do I get to know myself?

I am a single mother. As a child, I was molested by my mother's boyfriend. I never knew my father. I started having children at 18 right after high school. After having children, I completely lost myself and gave all of my focus on my children. Now my children are getting older, but I still don't know myself. I've had several attempts at relationships, and they all fail. I stopped caring about a lot after my children's father left me. I fell into a spiral and got depressed.