Well he's not a good man is he cos he's taking advantage of you!
How much have your food/grocery and utility costs risen in this time? Presumably you have online banking so do a search and write it down in black and white - pretty sure you'll get a shock!
My dd moved out about 2 years ago and despite the mn cliched claim that the costs are negligible:
My grocery costs have reduced by approx 1/3
My utility costs have HALVED
Are you in receipt of any benefits? Do you claim council tax single occupant discount? Because if so the fact he's staying there 5 nights a week likely would be seen as you committing fraud - not only huge fines but potential custodial sentence in the case of the council tax at least.
Stop being so passive, sit down and work out the actual costs and if you are claiming benefits etc then he either needs to move in and contribute properly or spend most of the week at his.
It's hard to know the increase in the bills due to him being at mine anyway as I'd have been here all along even if he wasn't here
It's not hard to know - go now and look at what your bills/usage were before this started and what they are now - you could even contact your supplier/s for this information
Yip, and he's managing that by sponging off you. Don't be a mug
Exactly! He's feathering his nest with your income
You need to be more financially savvy and assertive. If you aren't able to discuss this then I would say you're not really ready for a committee relationship