Dont let me look at his phone -___-?

You need to keep in mind that it is his phone and not yours. He does not have to show you his phone. And you have no right to ask for his phone. If you have trust issues with your boyfriend then talk to him about the trust issues that you have and forget about his phone. Arguing about his phone is ridiculous. You need to be able to talk to your boyfriend without having to fight with him about him not letting you look at his phone.