From your situation, it's a common case of transference. I don't want to expand much information but transference is simply the transfer of emotion to another person just to protect the subconscious ego. It may feel like love, but it's not... try to talk over your ex again, close up any unfinished business with each other and talk things over, especially telling him the truth first that he is not really your boyfriend but you really like him. Muster up your courage and do it. We boys are idiots at times