What exactly is acting childish?

I think you should end your relationship with that extreme loser. He already disrespects you by talking to you like you're a kid and he starts arguments for no reason.You're nevwer should cuss at your lover no matter what. He's the one that's childish. And acting childish shouldn't be a problem anyway. As long as you're both faithful,loyal and have respect for each other then there should be no problem. Leave him if he can't get HIS act together. Good luck