I hate a part of my mother but I could never tell her
Why do you hate a part of your mother?
I hate her for getting pregnant and leaving my life
You don't choose your mother so if they do things that hurt you it's okay to hate them. Leaving you has caused you a lot of pain that you aren't responsible for.
Yeah, I feel like she never cared about me, she didn't give a damn about me and abandoned me.
I'm sorry that she did that to you. You definitely deserve better than that. Maybe it would be best for you to let her go and focus on the people in your life that are positive.