Passage
I will love thee, O LORD, my strength.
I will love thee, O LORD, my strength.
Psalms 18:1 I will love thee, O LORD, my strength.
Psalms 18:2 The LORD is my rock, and my fortress, and my deliverer; my God, my strength, in whom I will trust; my buckler, and the horn of my salvation, and my high tower.
Psalms 18:3 I will call upon the LORD, who is worthy to be praised: so shall I be saved from mine enemies.
The verse centers on "love", "thee", "lord", and "strength". It is saying that the verse draws attention to "love" and "thee", so its meaning should be read from those terms before moving to application.
The next verse adds "The LORD is my rock and my...", so "love" and "thee" should be read forward into that movement. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "love" and "thee" with trust shaped by these words, not by a vague optimism outside the passage.