Fun tip I've used in this situation: just let them go first. If you're not sure what you're getting and need to look at the menu, just step aside and say to them "You can go first" and no one will ask questions.
As someone else who smokes way too much... I do it because I'm addicted to it. Most people don't realize that habitual addictions are addictions, and just because weed doesn't have physical withdrawal symptoms, doesn't meant you can't be addicted.
My good man, XKCD is currently on comic #2801. They've been around for well over a decade.