No you're being nice. He needs alot of help, especially if using, can he contact anyone for help like a refuge? From people I;ve known methadone has never helped and they have taken both. Be there for him and help him a little bit, warm clothing and duvet etc but dont start feeding him, users are the only ones that can help themselves, if they get too much help they think they dont need to change. Rule number 1 dont let him in house. You dont know him and users are likely to steal. See if you can get him a refuge number or if the YMCA can help. Has he mentioned any family to Mr Redcrx? How old is he?