Good for you for having the courage. Only about 3% of the population is emotionally mature enough to go down this road, but I’ve known many who did and they are by far and away much happier than the couples I know who suffer through traditional monogamy. Chances are, you’ll be enjoying each other (and others) for many wonderful years to come.
Ignore those whose ignorance, fears, and repressions cause them to post unhelpful comments. The world is for the brave, not the frightened.