As with any non-monogamous relationship, it's not something that everybody will have heard of, or agree with. The primary strategy is to be honest, and to take the time to answer questions, discuss how it might work, and decide if you and your significant other want to try a poly relationship together. If they are new to polyamory, they might not trust what the concept means, so if you are committed to this individual and want to try a way to explore your lifestyle preferences without damaging the relationship, this can take a while to work through. Hopefully, your lover will be happy to try something different, and once they do they'll never look back!