I know that this has been painful, but I hope with time that you realize the bullet you dodged. I don’t think for one minute that he actually considered your feelings and figured that you’d just miss him enough to let him weasel his way back in to your life. His behavior really highlights the lack of self-awareness and lack of concern for your well being (does he think his dick is magical or something – like it’d hypnotize you into coming back?)
Consider the money loss a misery-avoidance fee. You likely paid a fraction of what it would cost had you gone through with the wedding and came to the same realization a few years later. Go do something nice for yourself today.