You need to be a little more specific.
Do you want marriage for the legal/financial side? If yes, have you suggested to him that you simply pop down to the registry with your parents as witnesses and sign the papers?
Do you want marriage for the special day, with all the guests and every trimming? If yes then it seems reasonable to do that from a stronger financial position than either of you being at uni/in training or halfway through a house renovation.
On the other hand you sleeping in a separate room over this, and him basically shrugging and saying "whatever" would indicate that either you haven't both talked about it enough, or that you have talked about it, and he simply isn't bothered.
You don't want to marry someone who isn't bothered. Really really not.
Realistically, biologically speaking, you have about another 7 years or less in which to have your children. If you're not going to have them with this man, you need to get the hell out, right now, and start looking for someone who's happy to father your kids, assuming you want kids. You have to assume that you're going to be single for a while (having just come out of an 8 yr relationship) and then you have to date, you have to develop a relationship, you have to get married, you have to live together... call it about 3 years, minimum, from starting a new relationship to having kids with the new man.
That puts you on a clock for possible further future relationships in which you need to find someone to have babies with. If you break up today, this is.
Of course if you don't want kids then that's absolutely fine, no problem, you can do whatever you want with no time pressure. But I still wouldn't particularly want to be in a relationship with someone who shrugs and doesn't care when discussing something that is this important to me. Seems to show that you're just there because it's better than being alone, rather than because he loves you.