Marriage doesn’t change you, but I had spent my entire adulthood building a me and now we were an us. This is what changed. Not who I was, what I liked to eat or what I liked in bed. Like in any relationship, what you should be most worried about is how to still love someone after being together for so long. Everyone will tell you that marriage gets more and more difficult with time, but so will any relationship—with or without a binding promise.