According to Osho, habits are acquired, not your nature - so they can be dropped, but only easily. Struggling or suppressing simply swaps one habit for another. The key is awareness: understand the root impulse and your clinging, then let go without drama. Don't outsource your conscience to others' advice; see clearly for yourself, and the habit falls away naturally.
Understand why you do it, loosen your grip, and it will fade on its own—fighting it only turns it into something else.