clinging tendency

Increase the amount of exercise your dog gets daily. If you take your dog on three short walks a day, try adding a short run to it and taking him to a dog park a couple of times a week. An increase in exercise can help expel some of the nervous energy associated with clinginess. Exercising him before you leave can also make your absence less stressful.
-- How to Stop Your Dog From Being Clingy --

... something about yourself that you don't know. Something that you will deny even exists, until it's too late to do anything about it. It's the only reason you get up in the morning... We're approval junkies. We're all in it for the slap on the back... we're just monkeys wrapped in suits, begging for the approval of others.
-- Revolver --

In a relationship, whoever likes the other person more is prone of being clingy.

Clinging is not only found in relationships, though. We don't even cling exclusively to human being. We cling to social status, perceived safety, etc. All the things we think we cannot live without.

What is the cure for clinging, or addiction wearing a mask of insecurity? I believe it is to step out of our comfort zone. Start working our ass off. Stop taking easy paths to everything.

We will be liberated. And what a wonderful feeling it is to be free!