Without shared finances, inheritance, legal duty and practical dependency, connect with friends, family members and acquaintances can persist only with mutual willingness.
One person can make the first move. They can call. They can forgive. This can work for a while. But a lasting bond needs effort from both sides. Both must give time. Both must give attention. Both must show they care. Gratitude is a form of care. It stops people from taking each other for granted.
Otherwise disconnection is just a matter of time.