I would agree with snodderly...while you have had a relationship that is probably to YOU like a marriage the fact is you did not get married and he bailed...there is a blessing in this...better to find out now what he is made of then to actually get married and find out (costs money to split up then)...
If this is a sign of how is actions are in your relationship you might be better off cutting your losses...if that is not an option for you at this point...then do as snodderly suggested...move on with your life and if he returns you can decide where you want to go from there...
My personal feeling on this...he wasn't serious and is playing games...without having any kind of history about you both I wouldn't know if this is a pattern with him from past relationships or even with you...but that fact that he finds it so easy to stay distant from you tells me he has not attachment...and really you need to ask yourself..."How attractive is it form me to be waiting for someone who isn't married to me and bailed on me suddenly?"
I would start reassessing this whole relationship, but that is me personally.
