The Six of Cups is tied to a past energy. It can represent nostalgia, such as your childhood memories. You may have someone in your life who has stood by you through thick and thin.
When it appears in a love reading, the card may want to tell you that your relationship is influenced by past events. You could have a habit of reminiscing about the past or even missing someone who is no longer in your present. Your admiration for the past could be the reason that holds back your present.
Some of you could be dealing with a childhood sweetheart. But you or your partner could be struggling to let go of old habits and ideas. You two have grown up and the relationship should, too. Either one of you could be too busy looking back on the joyful memories that they neglect creating happiness in the present moment.