seeking advice on a guy's mixed messages: words vs. actions

I've been dating a guy for 7 weeks. The first few weeks we went out to eat, he invited me over to watch movies that he rented, he invited me to run errands with him, and he was very affectionate. Then he stopped initiating physical contact and he called less frequently. A few weeks ago, on a Thursday, I mentioned to him that I had the following Monday off of work. He was going out of town for the weekend, and he told me that his plane got in Monday afternoon. He said "Let's get together Monday". Well, on Monday he didn't call. On Tuesday I called him, but his voice mail came on, so I left a message. In my message I said that I guess saying "let's get together Monday" and not calling me was his way of sending the message that he doesn't want to see me, I've been getting mixed messages, and I'm confused. I didn't know what time his plane got in or how much time he needed to unpack or unwind from his trip. I also said if you don't want to see me or talk to me anymore, just tell me because I'm a big girl and I can take it - just don't pull a disappearing act on me.

He called me back the next day and told me that he's not playing games, he's the type of person that says what's on his mind, he's not doing a disappearing act, he was tired Monday and he went to bed early, and he's been really busy (which is true - he's renovating his house, working on a summer trip overseas for students at the school where he teaches, and he owns a business). Then he asked me to go to a movie the next day, and he called me the next day. When I read the list of movies that were playing, he said that none of them sounded too good. I told him that I honestly didn't like the movies that were playing, either. He asked if it was ok if we saw a movie early next week. He called 5 days later (he had friends visiting from out of town over the weekend) and we ended up seeing a movie. After the movie he asked me if I wanted to go to a bar down the street and have a drink, so we went and had a drink. At the end of the date he gave me a really tight, really long hug and a kiss, thanked me for going to the movie, and said something like "we'll talk again soon". That was last week on Wednesday. I called him 2 days later and left a message on his voice mail ("just calling to say hi, I hope everything is going well with your home renovation and your travel itineraries, talk to you later"). It's 6 days after I left that message, and I haven't heard from him. The other times that I called him and left a message on his voice mail, he called back the same day.

I don't understand. I don't want to be a pest and call again. I gave him an out and he chose not to take it. He could have at least called and said "I got your message, I'm busy with such-and-such, I'll talk to you later". If he's not playing games, he's not disappearing, and he says what's on his mind, then what is he doing? What do you think?