Why Do You Hate Yourself?

When I was young my brother used to attack to me and told me to shut up whenever I talked.When I went to elemantary,I was younger than most of the class and didn't knew to control my emotions and actions,so people made fun of me.As a result in second grade I shut myself and refused to befriend anyone.I had only one friend until seventh grade.(Actually I had more but I stable relationship with only one of them.)I got bullied by children younger than myself.I've got forced into a sexual relationship by a person that I've trusted to make me a better person.As a result I've felt inferior to everyone and I hated myself.
Don't worry,I'm taking my meds and my confidence is quite high!I also have more friends and don't see befriending people as an obligation anymore.