Hon,
Hate to tell you- but I think he met someone else. Explains why he cut you off, made it a quick phoncall ( he didn't want to cheat- but didn't want to tell the truth). He knows the hurt he has caused you, but selfishly, doesn't want to deal.
The good news - depending - he will probably come back to you, once he gets over the new one. The question then will be, do you want him back?