I have longed for thy salvation, O Lord - See the notes at Psalms 119:166. The word rendered “I have longed” denotes an earnest desire or wish. Compare the notes at Psalms 42:1, and the notes at Psalms 119:20.
And thy law is my delight - It is so much the object of my delight that I earnestly long or desire to see more and more of its richness and fullness.