HELP PLEASE ex boyfriend email situation ?

It was polte I think, to answer your question. To understand his lack of response, put yourself on the other end of that email. Pretend you decided to break the ice and write your ex either to try to be friends or more than friends again (more likely the latter), and you get this response in email. It would probably send you feeling low, right? No matter how "polite" or nice it was. It wasn't what you wanted to hear. So he's disappointed, understandably. But, you got what you wanted.