Leo man already talking seriously within 2 weeks?

Ok, so I had a secret love affair with a Leo man quite a few years ago. I have recently reunited with him on fb. Ever since we have been in contact again, 2 weeks, we have been texting constantly, he calls some, always answers my texts promptly. He has said I was the best sex he's had in decades. Texts me that he was just thinking about me. He has even said things like called me his wife to be. He jokes that he wants to know my every move, and doesn't want me seeing anyone else. He does tell me everywhere he is going and with who. He sends pics too, I guess to show he's telling the truth? He moved out of state and lives 9 hours away. I will be visiting him tomorrow. Just want to know if this is typical of Leo? Is he going to stop all this after seeing me again? I really cared for him a lot, and don't want to get my hopes up for a future relationship if he will get bored after seeing me.

Yea, well he is being weird today. Brief texts....only an ok to sending him info on where I will be staying. Definitely not the norm. So can't help but wonder what is up. Cold feet?