can you stop a bad habit

Depends of your caracter and personality ! I think i can !

Sure you can, it just takes a little work. Stopping something you have been doing for a long time isn't easy, but that doesn't mean you can't stop. I have quit lots of bad habbits. Just keep yourself in check or have a friend help. You have to be consistent about it too. If you slack off and let it slip you'll never actually be able to kick the habit.

yes if u wana quit any habbit u dont do that for 21 days regularly u will b able to come over that

Yes and it can be a painfull thing... I use to eat a lot when i came home cause during the day i dont, and let me tell you that take me a while before a get use to the idea

I would say no, I have tried to quit smoking several times, but I can't.

a little hard