I would flat out ask him if he has moved in since he is there all the time.. It is time to divy up all the bills 3 ways if he is going to be there all the time.

I have mostly lived alone but have had room mates from time to time and that does cause the bills to be larger... add another and they go up even more. If she wants to pay his part, that would be fine but I wouldn't foot the bill for HER boyfriend.. 2 days a week end does not equal 7 days...

I would also ask her to get a TV in HER room and for them to stay in there so you can enjoy your living room when you want to.

(I am so fussy that I REFUSE to have anyone sleeping on my sofa on a regular basis)