Cardiff I had one like this. He moved into my home (I have two older dc's living with me, well one is at Uni and as a single parent I always did my best to support her).
I'd managed before he moved in, just. We earned the same. Next thing I know I'm dipping into my savings, because he doesn't have any, to afford his lifestyle of golf, pubbing, and generally visiting his family (in UK but costly).
He wouldn't listen. A long story but in the end, I decided that, ultimately my dc's were paying for his lifestyle, from the money I earned to make their lives as comfortable as I could.
And I dumped him. Just like that. I could see it going on and on until I was in debt and my and dc's security was in jeopardy. He brought nothing to the table in terms of equity either, and was questioning how he would be looked after if anything were to happen to me (including pensions rights and accommodation etc. 
What a prick he was, I'm sure he knew what he was doing.
So I repeat, dump him, before he drags you down with him. 