First the background of my situation:

I have recently started a videogame community and news website. The website is based off forums I created around 8 years ago. I have not registered the website for copyright or trademarked it as I wanted to finish creating my logos etc.

While creating the website an old friend rented a video game server that came with a web page. He used the name of my website and old forums and asked me if I wanted to work together and we could have the server as part of the community. I agreed as long as he agreed to the server remaining a "open community" and not a videogame clan server.

This was about a month ago... within the last two weeks I noticed he changed the wording on his server and web page now showing "clan" and his practices have been of the same nature. I talked to him twice about it and nothing changed.

I posted to him that I was no longer associating my website with his server or web page, and to please change the name.

He responded by banning me from his web page and stating that I do not have copyright on the website so anyone can use the name.

Now for my questions:

What can I do?
Is it too late to copyright the website?
Whats better, copyright or trademark? or would I copyright the website and trademark logos?