Outdid himself to you , what does it mean?
A good friend is one of God's blessings. He really outdid Himself with you!

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Himself refers to God.
It's a compliment. It says God did more than his best when He created you.

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out do himself/herself/yourself/myself/themselves  means to make more than the usual effort.  It means to work extra hard on something.  It's used to compliment somebody.  "Wow you really outdid yourself on that presentation!"

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Outdid is the past tense of outdo.

To do more or better than in performance or action. 
to surpass or exceed in performance or execution