What to do when a guy i like comes to visit me?

I told this one guy I met a few weeks ago during a conference that I really liked him, but didn't ask for any answer. So, he just replied that he liked hanging out with me too. I thought the matter was closed as we met in a different city and I thought I will never see him again. So, I got over it. But he is coming to my city in a few days and it seems like the reason is to visit me. I wonder if he is expecting "something" and I should stay on my guard or if he just wants to visit as a friend. I think I still like him but I don't want him to take me for granted.

He will be here for 2 days and we will probably hang out the entire time as he wants me to show him my city. (I am 25, he is 30. So, we are mature adults and can pretend that nothing happened and we are just meeting as professional friends).