LORD, MY SOUL THIRSTS FOR YOU!
Really take Psalm 63 to heart: forsake any and every idol, acknowledge God as God in your heart, and earnestly seek after Him with all you've got. Yearn for more of Him and less of self. Thirst after Him and His righteousness. Ask the Lord to help you put to death the deeds of the flesh and make Him your sole desire. In the words of John Owen: "Do you mortify? Do you make it your daily work? Be always at it while you live; cease not a day from this work; be killing sin or it will be killing you."
This is the true thirst: the more we thirst for God and His righteousness, the more we are satisfied; the more we are satisfied, the more we thirst for more of Him!
On the cross when Christ died, He took our unrighteousness. He took our sinful life and in exchange gave us His sinless life. The old sin-corrupt "girl" has been put to death, and is now NEW in Christ. He dwells within, but she-that old sinful girl-is still very much within! This is the struggle and it will remain until heaven!