He tried to use women to fill the emptiness of his own life.
"He tried to use women"＝「彼は女性たちを利用しようとした」
"to fill the emptiness of his own life"＝「彼の人生の虚しさを埋めるために」
Example sentence:
"His work performance was mediocre, he had no hobbies and no friends. So he stalked women and demanded attention from them in order to fill the emptiness of his own life."
アメリカ合衆国 
