Let me get in the line of people and affairs and how addictive they are: Not in line for myself, but for my STBX. She absolutely can't kick the habit--she gets such a high from it--lives every minute for the next encounter.
Watching her get ready to leave on a trip was always a very scary thing: she looked exactly like a lifer-druggie anticipating the next high, the next hit, whatever.
It really is scary how addicted they are, and it's even scarier what they're addicted to, especially when they lie about their addictions and their whereabouts and you only find out later what they've been up to.