Just doesn’t get it

This is always something that happens, I tell my boyfriend I want some alone time or that I have something serious to talk about he never gets it. When I say I want to have time off my phone he just keeps messaging me. He just sends stupid photos and thinks sexting will change how I feel. On Sunday I think I’m going to tell him I need a break to think about what I want. He just gets on my nerves and acts like a boy and not a man