I've decided to ~ , I have decided to ~

#.  I've decided to ~ I have decided to 

나는 ~ 하기로 결심했어. 나 ~ 하기로 결정했어.

 

I've decided to become a lawyer.

> What? You didn't even study law.

So? I'm going to start studying now.

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I've decided to stop drinking.

I've decided to start working out.

I've decided to buy the house.

I have decided to become a singer.

I have decided to marry you.

Today, I have decided to resign.

I have decided to accept his apology.

I have decided to become a vegetarian. 

=/=  I can't decide where to live.