Hi Steven, good idea on having your money in your g/f’s account. Is she aware of the problem? If you asked her for a lump of money will she ask you what it is for? It will still be your money of course, to spend on buying/doing things, but an element of accountability helps.
Does she know aboput your debts/credit cards? It is important that she does or of course it will be hard to maintain debt repayments if she is looking after your money for you. Trying to keep debts hidden can in itself send people gambling.
Are your debts manageable? If not then you can get some expert, free advice at either the Citizens Advice Bureau or Stepchange.
Keep posting.