The song "Nothing Really Matters" by Gabrielle Aplin is about a relationship where the singer realizes the importance of their partner. At first, the singer admits that they didn't fully understand the depth of their feelings and considered it to be too overwhelming. However, they find themselves in a mess, similar to a head rush, realizing it's a mistake to let go. The lyrics suggest that the singer had internal conflicts and was hesitant about committing to a long-term relationship. They confess that they were scared of forever, unsure why they had this fear, but now they realize that the time to be together is either now or never. The chorus emphasizes the significance of their partner by proclaiming that nothing else really matters except them. It implies that their connection overrides any other concerns or distractions in their life. The singer also reflects on their tendency to constantly search for something better, metaphorically referencing the grass being greener on the other side. However, they come to accept that they have always been a dreamer. They learn to let go of control and ask their partner not to let them go. Ultimately, the song expresses the singer's realization of the importance of their relationship and their willingness to give in and prioritize their partner. It conveys a sense of growth, accepting their fears, and embracing the love they have found.