Oof. I get that. I think I also get addicted to ****** people because it makes me feel less crazy. Twisted logic.
Anyway! It's awesome that you are feeling free without your toxic pal! That is something you can build on. You've already come so far. I think in that case, time is the thing. Just let the days go by. The longer you are without, the less lonely and more accustomed to being without them you will be?