Does he always try to impress you?
Men will behave, well, like men! A guy who is attracted to you would go all out to impress you. He may brag about his work or wealth, he may shower you with gifts, or dine out with you in style. The bottom line is that he is doing all this to impress you and win your heart. You can't surely ignore him going all out, as this sure sign can give you an indication of his thoughts.