How do you let your boyfriend know you are pissed off?

when you single you still get treated like you in a relationship... or you are taken but just don't know it yet. how do you let your boyfriend know you are mad?? Multiple text messages back to back? I been texting him with the thought of him being sleep because he said he was tired... when I get mad I text back to back then say "fuck it have a goodnight" if you barely send me a text message back  just tell me you busy or something gosh. If I wake up mad it's not gonna be pretty. whether we together or not don't lie to me about a question and feel you need to be mad as if you caught me having sex. He gets mad when I don't give him an explanation. Then he blurt out he don't care we not dating. We talk everyday if I don't text him he texted me. I'm not the blame for his past in general. He's a great guy but what 2 people don't argue.