Why has he changed?

I have been talking to a college friend for about 2 months, now. When we first began talking, he expressed how he has always liked me. He said I was his college crush. We have both graduated and are working good professional jobs. We live roughly 2.5 hours apart. We are both 23 years old. He and I were talking daily for about 3 weeks and it began to slow down, suddenly after that. I really like him, and I thought it was so nice that he was as interested in me just as much I was in him. The only strange thing that happened was, about a week into talking, he said, ‘can we fast forward to the part where you’re my woman?” I gently declined telling him that we needed to at least see each other again and spend a little time together before that happened. I visited him one weekend, because it was on the way to me going to visit my parents. We had a really nice time and it just made our feelings for eachother grow even more. About a week later, I told him that I thought that becoming a couple was a good idea. Surprisingly, he said “After one visit?!?!?”. He told me that he took relationships seriously and he wanted us to take our time. This confused me because it contradicted what he had just said a week earlier. I brushed it off thinking that it must have just been a joke when he wanted to “fast forward”.
I’m so confused and things are getting pretty awkward, now. I don’t feel close enough to him to have a heart to heart about it, but I’d like to know what has slowed things down and made it seem like he is suddenly uninterested. Can anyone tell me something I might be missing?