Phrases Apologies and Excuses

I'm really sorry.

Meaning

A stronger expression of apology.

John: <b>I'm really sorry</b> I broke your pen.
Alice: It’s okay, these things happen.
John: I feel terrible about it.
Alice: It's not a big deal. But please be more careful next time. <b>I'm really sorry</b> I didn't make that more clear before.