Best thing you can do is go talk to a professional who can help you

There are a lot of gambling advice groups who can help, a google search will help find groups local to you.

Such as http://www.gamcare.org.uk/forum who also have an online forum http://www.gamcare.org.uk/forum
these guys are also very popular http://www.gambleaware.co.uk/

Next thing you need to do is ask all the gambling sites you currently with on to close your account and accept no further bets. All reputable sites will be able to do this easily and will have no problems with it.

Best of luck!