Related Clues:

• Worry persistently
• To be excessively preoccupied
• Take control of
• Monopolize one's mind
• Worry compulsively
• Haunt one's mind
• Totally preoccupy
• Preoccupy completely
• Have a one-track mind
• Be preoccupied with
• Take hold of, in a way
• Prey on the mind
• Stew (over)
• Become preoccupied
• Think constantly (about)