I have been with my boyfirend for over year now. I found straws and empty bags a few times. I finally got him to confess he was using meth and only sometimes he said. He works many hours and works around the house all the time sleeps a lot and eats a lot and craves sweets. He is moody and can get hatefull and will not take blame for his actions and says it is me. He is not thin and is a little over weight. He gives me money when I need it. He has no friends but me and is not sociable at all. He says he has quit using but how do I know for sure?