If its initial stages, like you just met him, or he's relatively new in your life, then yes he definitely likes you!
But I've gone through this, and even had more signs, conversations, flirting, and then went through hot and cold games, and still was weak enough to like him back when he'd be all nice and sweet again...i let this carry on for years until I realized he doesn't deserve me at all. Some guys just like playing with your head and act like they like you, but won't pursue you, just look out for that, and don't expect much from him. Go with the flow and let him pursue you! Show interest, and flirt back if he flirts, but don't expect him to be crazy about you. Men are unpredictable.