There's someone who treats me like I'm worthless, but I find myself addicted to them.
Could you tell me more about them?
He manipulates me but he also says he loves me at the same time
You shouldn't let someone manipulate you. Manipulation is not a sign of love.
I love him so much, but he's so manipulative. How the fuck am I going to get out this cycle?
Despite the fact that you love them, you deserve to be treated with respect and you should end the relationship. Have you considered counseling to address the issue of you allowing others to make you feel worthless? You deserve better than this.