fionaf
People get married for lots of reasons, I would not worry about what the DWP think of you.
You need to inform all of the agencies that you receive benefits from; ESA. DLA and your Local Authority.
Your DLA will not be affected.
Both your ESA and HB will be affected when you live together and you will only be able to have one claim for the household.
I would recommend that you get face to face advice from a qualified advisor, they will be able to calculate which option will give you the largest income, do an internet search for "welfare advice" with your postcode, town or county.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems