As many other people have said, as long as both parties are of legal age and consenting, then there is no problem! Long as it makes you happy. Obviously the larger the gap there may be other issues come up with time with physical abilities and sex drive and what not, but just be honest with each other :)
I think the world spends too much time trying to judge others. Frankly be happy, this world is so negative at times but also be honest with each other on where you are and what you need.