That is the aftershock of first love, if you are confused with your feeling, don't use other people to look something that is in him that you want to experience, because later you might regret it.

Focus on your daily lives your studies, work, family and friends, someday you'll realize what you really feel towards him and if someday you'll meet again and you have the same feeling and he has the same feeling too and still single then you can start making relationship officially.