As much as it shouldn’t be an issue for anyone but the two of you, people will have a problem with it. Personally, I don’t think I would ever date anyone that much older (or younger) than myself, but that is not to say that I would find that impossible. If the two of you are happy, then that should be all that matters. I think this is one of those situations like inter-racial couples. It shouldn’t be an issue; it is only the business of the two people in the relationship. But people are weird, and find problems with these things. My advice is just listen to your heart. You are both mature adults, and if you make each other happy, then who cares what anyone else thinks?