It seems as if he likes you, sincerely. However, you should be able to discern whether he likes you as a friend, a little sister, or a fine girl. You don't need signs for that. You just feel it. Like when he's talking to you, does he lean over as close as possible and look into your eyes? Does he ever touch you in a partonizing way, that makes you weak in your knees? Does he "accidently" grab your hand sometimes?
It's really easy to tell if a guy likes you actually. Even without those signs for the clueless

You have to have serendipity.