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In reply to the discussion: Serious questions about pot smokers [View all]Warpy
(114,750 posts)and being careless with it when you're together, just take him or her at his or her word that it helps reduce anxiety. If it's medical pot, you have few legal worries for dating a daily smoker.
Pot doesn't really blunt the personality the way a lot of psychiatric medications do, so there's no problem there.
What you can do if it's medical pot and you want the relationship to move forward but don't want to live in a smoked up house is introduce the person to vaporization. That releases the psychoactive chemicals in cannabis without actual combustion and is a lot better for the health of the smoker.
http://www.420vaporizers.com/
ETA: I should mention that I knew quite a few cutting edge researchers at MIT who toked up daily when I worked there. Pot doesn't destroy motivation unless the person was pretty unmotivated before s/he started to smoke it.