You don't. First, meth is an amphetamine. If you are referring to amphetamine as in Adderall, you can't make meth out of that.
If the person begins to seem a bit angry at you and doesn't tell you why then it's probably because they are becoming jealous at what you are doing.
The easiest outwardly visible sign of Methamphetamine use is rapid weight loss. Another sign is that the user often becomes careless about their appearance and overall physical well being. The user's...
911, and the Department of Defense
Telepathy.
By seeing how that person acts around that personAnd sometimes you don't because they do not show it at all