How to get over peoples wrongful assumptions about me?

So I work a 2nd shift job because that’s all that was offered. But I work that shift I work until 2:30am so I get very very tired while working. Like I’ve been working on adjusting my sleep schedule but it seems taking a nap works best. But anyways, my eyes are red and dark around them and I’m a very joyful person like I smile a lot and am pretty calm too. That’s just who I am. But people think I’m a big smoker like I’m always high. Which I’m not. Luckily they don’t fire based on weed. But I’ve got a group of friends and they asked me first if I smoked and I said no and someone asked them if i do and they said no. Should I explain to everyone that I don’t or just leave it be?
How to get over peoples wrongful assumptions about me?
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