What does it mean when he talks like this???

The other day I was at my boyfriend's house and we were busy in the bedroom and he said that he wanted to marry me. I said that I wanted to marry him (which I do) and then he said "will you marry me?" and, of course, I said yes. Then he asks when I want to get married and I didn't know what to say so I said when do you want to get married and he said "we can go to the courthouse tomorrow" and we laughed and I said soon. Then he said when do you want to start having kids. I said soon (we are both nearing 30). So he said that we should start trying this month on the days I am more likely to get pregnant. I said that we should do that. So everything was great and I am thinking that he really wants to get married and have a baby and stuff and then last week...we were busy in the bedroom again and he asked me when I am more likely to get pregnant and I told him and that was that. Then later last week we were busy again and he asked the same thing and then asked if I was sure I wanted......