I could see this either being about friendship or a romantic relationship. If it's about a romance, it's celebrating small, sweet moments of a couple that has secluded itself. If it's about friendship, I'd say it's suggesting people should be nicer to each other. Girls are notoriously vicious to each other, and Brittany represents someone like that; she so used to that "cliquey" lifestyle that she can't understand what being genuinely nice to someone is like or how it feels to receive that kind of kindness.
I could see this either being about friendship or a romantic relationship. If it's about a romance, it's celebrating small, sweet moments of a couple that has secluded itself. If it's about friendship, I'd say it's suggesting people should be nicer to each other. Girls are notoriously vicious to each other, and Brittany represents someone like that; she so used to that "cliquey" lifestyle that she can't understand what being genuinely nice to someone is like or how it feels to receive that kind of kindness.