I'm going to take PS20 from my boyfriends car.
Why would you steal from your boyfriend?
He doesn't work and relies on me for everything, I'll hit him where it hurts him.
Taking money out of your boyfriend's car even if you are the one supporting you both is still stealing. Leave his money alone.
I don't consider it stealing as this is technically money that he owes me.
Money can be a major problem in relationships, but it's still not right to steal. You should talk to your boyfriend about how you no longer want to support him for everything financially and assert that you want to be reimbursed for some of the things you have paid for.