Advice needed

I started to date this guy on the begging of October. I have never been this happy with someone before. Everything seemed okay until this week when our communication started to be weird. His responses on my messages do not make any sense. I know he likes to goof around with another people (his family and friends), but he never did with me....we haven't seen each other since Sunday and like I said did not have any normal conversation. It drives me crazy and I am not sure now much patience I will have with him if this continues. I wanted to see him today but apparently he's going out of the town for a weekend. We are not in official relationship yet, so I am wondering if I should let it go and forget about him? Or keep waiting and hoping that things will get back to normal...
P.S.  I'm 28 years old, and he is 43 :)