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).
Use water to dilute alcohol to expected proof. Depending on the reflux still, your undiluted rum can be up to 95% alcohol, which is dangerously strong for consumption. Use a dilution calculator to bring your rum down to around 45% for the best taste experience.