Flustered girlfriend

(I'm using fake names) John and I met in a class over a year ago and became friends almost instantly. Then, we had 3 classes together the following semester. I had a boyfriend when we first met but I broke up with him for unrelated reasons that January. John had also been in a relationship for 4 years when we met. Over the semester we got really close and I found out they were living together. Fast forward to April. John broke up with his now ex and we started dating almost immediately after. (Mind you no innaptopriate behavior happened beforehand between us). I have been weary of the fact that they had lived together and he jumped into a relationship so soon after the breakup with me but we have made it through. I know I love him more than anythig an he claims he feels the same way. We've talked about marriage and kids in a very innocent manner. Nothing too serious but he's 25 and I'm 22. He tells me he's ready to settle down and have kids and gets really upset thinking about how he will be 30 in 5 years and how he wants to have kids before he is 30. He also tells me he can see us having children together which is a big deal for him. But, we were talking about our future today and he mentioned that,once we graduate next December, he would CONSIDER letting me move in with him until I found my own place or a job so I could afford my own place, mentioning that he and his former "roommates" (meaning his ex) didn't mesh. I get that they were together 4 years and we haven't been together nearly that long but what does that mean? Is he afraid that once we move in together he is afraid things will fall apart because that's what happened between him and his ex or is it that he doesn't care for me as much as he did her? I'm also frustrated because nowhere in our college town offers 6 month leases and I have to find a place to live for next semester while he can stay in his apartment now until December. He obviously hasn't offered to let me move in and I would never ask that of him but, ALL of my friends have asked me why we aren't since it is the most logical thing since I basically live there now anyways. I just don't want to make him think we have to move in or guilt him into it. I'm just hurt because he sees how stressful it has been for me to find a place to live. What should I do? Should I talk to him about it or just keep it to myself?