What does it mean if a guy says he thinks highly of you?

Answer 1

That would mean he respects you....your intelligence, your morals, your sense of fairness, etc.

Answer 2

When someone thinks highly of you, they respect you. They think good things of you and admire your words and actions. They hold you in high regard. It's a compliment.

Answer 3

If a guy says he thinks highly of you, it likely means that he has a positive opinion of you and respects you. He may admire your qualities, values, or behavior.