Crystal Meth… Help me!?

So my boyfriend recently experienced a meth addiction although he only was doing the drug for about a month, it took ahold of him very quickly. After about 2 days or so of being off of the drug he became severely paranoid such as driving 2 states over thinking someone was following him, trying to kill him. He makes me take the first bite of everything he eats or drinks because he seems to think that even i would Poison him. He went to the hospital and was diagnosed with GAD which causes panic attacks. We’ve been together for 7 years and he had became very close with my family and seems to think that every single person in my family is literally trying to kill him. So my question is has anyone ever experienced this? Why do you think this is happening and do you think it will get better?

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