Charles H. Spurgeon on Psalms 119:120

My flesh trembleth for fear of thee. Such was his awe in the presence of the Judge of all the earth, whose judgment he had just now been considering, that he did exceedingly fear and quake. Even the grosser part of his being, his flesh, felt a solemn dread at the thought of offending one so good and great, who would so effectually sever the wicked from among the just. Alas, poor flesh, this is the highest thing to which thou canst attain!

And I am afraid of thy judgments. God's words of judgment are solemn, and his deeds of judgment are terrible; they may well make us afraid. At the thought of the Judge of all, his piercing eye, his books of record, his day of assize, and the operations of his justice, we may well cry for cleansed thoughts, and hearts, and ways, lest his judgments should light on us. When we see the great Refiner separating the precious from the vile, we may well feel a godly fear, lest we should be put away by him, and left to be trodden under his feet.

Love in the previous verse is quite consistent with fear in this verse: the fear which hath torment is cast out, but not the filial fear which leads to reverence and obedience.