Meth. Is not something I've ever experimented with. I see the effects it has on people but none of those through close friendships. I suspect my boyfriend is using something I think meth. We have been together 5 years and have 2 kids. He has always been a bit moody and sleep always been an issue. I've even suspected a possible bi-polar disorder. But recently he's not eating, sleeping, agitated easily, and seems to always be in a hurry and talks very quickly. I now suspect something else is going on. How can one tell if their parter is a user? Am I at risk by sleeping with him or being intimate with him, such as chemicals being passed through semen? Someone please help me.