Dear sencha008:
I don’t see a reason to not send him a short message, something like this: a month ago you asked me to meet you for coffee at some points and be friends. I said okay but you didn’t contact me since. Did you change your mind?
You can state your message differently, of course, but the aim is to get information from him to a specific question, and not to add more than necessary details and topics in that one short message.
anita