After 3 Months Has The Man Lost Interest?

I met a man on June 18, 2010 and we hit it off right away. He asked for my number and called me on his break the first day. He called just about every day thereafter. We had our first date on July 12, 2010 and we both felt it was a wonderful time. He continued to call frequently and to make arrangements to see me at least twice a week thereafter. He went out of town in the middle of August to help out his family. I knew I wouldn’t hear much from him during this week while he was gone (in fact he only texted me once). When he came back his work schedule put him on the late evening shift and I wasn’t able to see him for two additional weeks. He did continue to call and text at least two times a week while we were not able to see each other. The last time we were together was Friday, September 3, 2010. (It had been 3 weeks since we had last seen each other and he told me how much he had missed me). At that time he mentioned that the following week on Thursday seemed like it would be a good time to get together again. He called me on Tuesday of that week and mentioned again that he thought Thursday would be a good time. When Thursday came and I had not heard from him by mid afternoon, I texted him “how is your day going, are our plans for tonight still on?” and he replied “actually, no, sorry.” I texted him “thank you for letting me know. I hope to see you soon.” That was the last I have heard from him. I am wondering if in the course of our nearly three month relationship if he has come to a point where he feels comfortable in the relationship so as to not be calling or texting as often, (this may be wishful thinking) or since it is harder to see him with his busy work schedule (he works two jobs) and helping his family when they need him, if he is losing interest with me? We have talked with each other about being exclusive so I don’t worry that he is seeing someone else. He is 41 and I am 44. We have both been married before. Do you think it is best that I wait for him to call so that he has a chance to miss me or so that he will be the one to pursue me? (I am always reading that guys like to be the pursuer and leader in romance). Since he used to call and see me more often I wonder if it is that he is losing interest? Or if this is normal stuff to be going through in a new relationship? Thank you for your reply to my question