Imagine vampire…
… going to AA meetings and addict support groups trying to curb his bloodlust and regain self-control. Yet no matter what he does, he always ends up in front of your house, or just trailing you in the commuters crowd, because gods be damned, you smell like all those happy, lazy days of his youth. When things were easier. When things were simpler. Just as it would be simpler to drink you up like sweet summer wine.
But no. Some part, some long forgotten part wants to protect you. You are an addiction for which there is no cure. Your silent shadow will need to learn to manage it, just like any other suffering soul in the support group does.