Is it normal for a guy to distance himself without obvious reasons?

Hi,
So here it goes. I knew this guy a year ago, he worked in a company where I was a trainee for like 6 months or so. We took bus together, his office was right next to mine so we had the chance to talk several times. In different occasions I saw him staring in secret, he approaches me all the time, and he enjoys talking to me but never made any obvious step. When I finished my training, He sent me message on Facebook followed by a friend request. Since then we talk from time to time about general stuff. A week ago, he asked for my phone number I gave him, then he asked me if I'm single. At this point I didn't know what to say well yes I'm single but I don't want to say it in a desperate way. So I kept turning around until I said it. He stopped talking to me for two days then he talked back. This time he told me that he wants to make a new family and stuff like that then he asked me what are my future projects I told him that I want to have a good career and he was like what about romance, I said yeah I want to have my own little family. Next thing he asked me when can he see me I changed the subject because I felt like he is rushing things so he didn't get back to that subject again. Then we kept talking about usual general stuff until I ended the conversation and he was like "see you soon". I want to mention that the whole conversation went through Facebook. I don't even know why he took my phone number if he wasn't willing to call. It has been a week since this conversation, I see him posting things but didn't text me again. Well I'm not that into him but his behavior kept me wondering, would that be normal ? If so why would guys do such things? By the way he doesn't seem to be an introvert he is actually the kind of guys who is friend with everyone ...