I Am Trying to Break My Bad Habits

Do what I did: let your nails just grow. Don't cut them, bite them, or even look at them. Just let them grow.

Sometimes a bit off a nail and use it to clean under my other nails

Paint them to avoid biting them.

well, i have an advice, try to but something not tasty on your nail edges , in this way you may feel disguise.

That's so bad a habit. ..I always have really long natural nails

Break bad habits? Why do you ask?