I feel like there's a lot of talk about how to get the girl of your dreams. But what about the next step, for men already in relationships whether it be new or old. What do you do to maintain a romantic relationship after the initial few months after meeting someone new?

Or not necessarily romantic, but what can one do to make your SO feel attracted and wanted after all the initial magic begins to fade away when you've passed the first few months of getting to know one another.

tl;dr: What are some things you do in your relationship that makes your SO feel loved and happy?