I say do it!
I would get my husbands name on me in a heart beat. We have only been together 6 years and I would do it no questions asked. I love him with all my heart, he is my best friend, and the father of my children. No matter what happens I will always love him for every reason I do today and wouldn't regret it. I would always think about all the great memories! After all, isn't the tat a representation of the good in the relationship?