He called off the wedding and left you hanging. Now what? What do you need to do now? That all depends on how you feel. If there is still love for him, then you have to decide if you want to continue to pursue this relationship, or if you want this sudden roadblock to lead to a permanent rift between the two of you.
First thing you want is for the guy to answer for himself why he called off the wedding. Not only this, but you need answers to the questions that surround this event. There is obviously more here than meets the eye, and if you want to get things back on track, then you need all of these questions answered, and soon.
Here's the thing. Just because he called off the wedding does not mean that he is against the whole marriage thing. Men are panicky by nature when it comes to weddings. Maybe it is a control thing. Maybe he is checking out a size nine pair of cold feet. What guy, right before the big moment at the altar, hasn't called the thing off for one reason or another that has nothing to do with her? Or at least thought about calling it off. It could mean that he just wants to take a step back, breathe a little, then proceed a bit more slowly than the two of you have up to this point. This is an okay thing.
Calling off the wedding is one thing. Calling it off and leaving the relationship is another thing. The two are not bred from the same thoughts. You need to consider this in your situation. You need to differentiate between a temporary commitment attack, and a permanent claustrophobic in a relationship attack. Does he need to just get his bearings, or is he scanning the horizon looking for a quick exit out of Dodge?
After getting some answers, and going through the situation with him, the next obvious step is to give him a little breathing room, a little time to wrap his head around his thoughts of marriage, commitment and you. So, during the days that follow the called off wedding, you are not going to be glued to the telephone, or trying to text him every hour, wanting to see him. This will only backfire on you and send him further away, possibly for good. So, take it easy on the poor guy and give him time to think.
Remember, then, that there is a huge difference between whether he called of the wedding only, or if he is thinking about calling everything off. So, to help him sort himself out, you go to your space, and let him hang out in his, and just be ready to come back when he is ready to talk through things again. That way, you aren't freaking out on him, and he has an uninterrupted view of his mental state, so he can work through his feelings and decide on his own what he is going to do next.
