I'm sorry for causing you misery.
I'm sorry for adding on to your burden, for giving you trouble.
I'm sorry for being presumption, thinking I know what's the best for you.
I'm sorry for being stubborn in that I though i knew what I'm doing is the best for you when you wanted otherwise.
I'm sorry for trying my best to give you what guys always wanted - freedom.
I'm sorry for insisting on my way.
I'm sorry for not being mature enough.
I'm sorry, I should have just keep my mouth shut and let you do things your way.

Sorry.