Hi Tony and welcome and amen to what Stone said.
Is there any group you could get in touch with in Brighton? I spent a lot of time down there once upon a time and if there's one thing there's no shortage of there its people with drug and alcohol problems... You will need all the sober support you can get in the near future, while you rebuild your social and emotional life. You can do it, no matter how grim things look right now. But if you go back to Ibiza right now, you will end up doing a ton of drugs again, it's almost 100% certain.
Keep posting.