Simpson, married to his childhood sweetheart for almost 19 years, had walked out on his wife and kids and into the arms of a younger woman. The breakup surprised his wife, his friends and even Simpson himself. Looking back, he says, it was a classic midlife crisis.
In that we have already provided the definitive answer to this question elsewhere (relying on rum extract), we assume your follow-up is seeking a non-alcoholic substitute for rum (as extracts can be as alcoholic as or more alcoholic than the spirits they replace).
1 Rum and Ginger is the next on our list of best rum cocktails and is a perfect alternative to a Rum and Coke if you're looking for a change. Mix a top shelf rum with ginger ale and add a twist of lime for a different take on a rum cocktail.  Pina Colada.