Complete the sentence my friend says he wants to divide his life music on of to

It seems like your friend wants to express a desire to divide or organize his life or music into different parts or categories. A possible completion of the sentence could be:

"My friend says he wants to divide his life and his music into one of two parts."

or, more clearly:

"My friend says he wants to divide his life and his music into two parts."

If you can provide more context or clarify the original sentence, I can help craft a more accurate and fitting completion.