Your images are average, have some technical problems (white bal), and don't engage me. I don't get a sense of who they are, or any sense of a connection between then. They could be models, friends, or strangers. I don't say this to be critical, I say this to give you an idea of the direction you need to take to improve. You need to show the connection between couples, how they feel about each other, the chemistry, and you have ten minutes to do it.
You need to make the couple more comfortable. Get to know them a little more, then get the h3ll out of the way while they're with each other. People need permission to express themselves around you, they're not used to photographers, cameras, or being themselves around anyone else. The key is realizing this, then getting experience doing it.