Please excuse me for being rude.
Please forgive me for not staying in touch.
Please forgive me for not keeping in touch.
I wish you would look over my composition.
I am grateful to you for your sympathy.
Please excuse me for my rudeness.
I am sorry to make such a claim on your friendship―presume so far on your friendship.
お許しを。
Forgive us.
申し訳ないこと