Is it normal to smoke with my best friends boyfriend everyday?

That used to be me; jealous because my husband and best friend would smoke together and I didn't. But I had to suck it up (literally) and realize I needed to change if I wanted to keep my friends. So now I pretend to like smoking weed so we can all spend more time with each other. It's much better because now no one is cheating or lying or sneaking around and I feel more include and liked amongst them. They're both much happier. Hopefully, your bestie will come around and change if she knows what's good for her.