Is it okay to want my husband to quit smoking pot?
Why do you want your husband to stop smoking?
I'm scared that he will end up like my dad
I can understand how worried you are about this. It's good to want your loved one to stop participating in something you perceive to be bad for them. I think you should discuss your worries with your partner and let them know how you feel about it.
How can I ask him to stop smoking pot when I smoke it all the time with my husband.
It sounds like you really care about him, and that means that you should stop smoking pot too. If you both stop together then it will be a whole lot easier for him!