Can anoyne help me I think I got hacked
 

OK well it says this when I try go on it:
Forbidden
You don't have permission to access /forum/admincp on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

And when I click on my forum folder in my hosting nothing comes up just empty space.

My sql is still there and i checked and repaired it and sure enough the files are shown like config.php and stuff. But when I try actually access forum nothing comes up.

Any help would be apreciated.

By the way my msn/yahoo is jambo.c@hotmail.com

Sounds like you are getting the error because there is nothing there to fetch. You should be talking to your hosting company about missing files.

ok its just weird cos I know this guy who hacks and he ot angry at me last night and then when i woke up boom it was gone

there are a few ways to hack into a board/server.
is your webspace really empty or is there still one file, which you dont know? If so, it´s maybe a shell which the hacker is using. Make sure your ftp-client is able to show you .ht files, which are normally hidden, otherwise it can happen that you dont see anything, but there is a file.
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change your username for your ftp and/or controlpanel. Look for security patches for your board and install them (if there are any patches avaible). Check if the php-version is up to date. If not ask your hoster to update it or patch it.
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To list all possible ways to hack into a board would burst the topic.