hmmmm when men said that he is bzy..he might be really bzy thats y he didnot reply emails, or text or call.but whenever he gets little free time he will first reply ur emails, calls n all.sometimes they actually mean that they were bzy.

n if u want explaination then believe what he is saying.

if he is taking blame of his fault.then it means he want to end the argument n agrees that it was his fault , he will take care next time.