'她是我这个世界上最爱的人'怎么用英文讲?

I love her most in the world.
或：She is the person (that) I love most in the world.

She is my favorite of the world

She is my favorite of the world's people

She is my dearest person in the world.

She is the person I love from the bottome of my heart.

你跟别人说这句话的时候用
She is my favorite in the world.

你跟她当面说
you are my favorite in the world