don't think thatFollows a clause to express that the speaker does not believe or feel something is true. Often sounds softer and less direct than a blunt negative statement.
French is way too difficult, so I don't think I want to learn it.
phraseRare#29,628
don't think thatUsed to express a negative opinion or belief. The phrase often follows a noun, adjective, or verb in plain form, with と marking the thought or opinion.