How can i heal my constantly dry chapped lips? i tried every chapstick and aqaohor and nothing worked. i've been picking on my lips for about 15 years

See your doctor: If you are well hydrated and use aquaphor and sunscreen on your lips frequently, your lips should not be dry still. I would ask your primary doctor or your dentist about more rare causes.

Underlying cause ?: Mouth breathing, lip licking, teeth grinding and other habitual activities (picking) will prevent your lips from healing. Look for an underlying cause e.g., stress, obstructive sleep disorder, etc.