Wellcum to all the noobs! Mm..smell of fresh meat.
And SpaceBridge's Facebook pic...yu-mmy!
Well, btk..I'm no expert in relationships, as in haven't been part of one..ever...

I do think that relationships are supposed to be something mutual and communication. In your case, it seems you both expressed your feelings towards marriage (you: do want, him: do not want

).
But in this case, have you both talked about "why"? In that why he doesn't want to marry anyone.."ever", and also why do you want to marry; and specifically at a minimum of 30?
Like cases I've known where one doesn't want to marry for fear that marriage could bring "problems" into the relationship; while other wants to marry because of fear that by not marrying the other can walk out of the relationship at any time.
Like everything, communication is key. If he brought it up in an unexpected way, there must 've been something that triggered that because he knows you want to get married.