Actually, she was putting so much effort into the relationship, but he didn't care. "Hence the sleeping". The binoculars in the beginning and the selfies she was taking with him while he was asleep symbolized how the public are watching and they have to keep a good profile for everyone to see. The picture of him once awake on her phone symbolized how they both used to love eachother. At the end, after her friends basically leave, which means they are trying to tell her its time to give up, she's left alone in a room with him. She starts dancing, signifying her growing independence, and the last tear was for the last feeling she had left for him. She gave up on him, and that's why he woke up. He didn't realize what he had until she was gone. ~That's my interpretation, lmao.