I am not being flippant. We used to be too busy to pay attention to what was happening in relationship and also we did not expect so much from relationships as we do today. Love addiction is normal for teenagers. It is when you don't get over the addictive quality as an adult that you have a problem. That is very common.
People use other substances and processes to medicate the withdrawal from the love avoidant.
Love addiction I think is a deeper issue than most other addictions in that it circles the issue of whether one is loved or not. Being loved and feeling lovable is essential to mental health. Recovery is really about learning to love oneself, and in that learning how to maturely love other people. Loving the self precedes learning how to love another. Most people only can love another when the other is being nice or making the other feel good.