Sounds to me like you aren't in love with either of them. You are still getting to know your boyfriend, who by all accounts is a good bloke to treats you well and you are in love with the idea of the man you want your ex to be.

If you were in love with your ex you would be with him and you wouldn't have any issues standing between you. It is clear by your posting that you are merely fascinated by the thought of the man he could be and not actually who he is this minute.