Just because she seems so strong doesn't mean she didn't go to sleep crying, even if you see no problems, doesn't mean she's not hiding. You might think she's happy and honest; inside she's lying and broken. She knows it's the real world and things will fall apart, when the people you know become the people you knew, when you can walk right past someone like they were never the biggest part of your life, she knows that everything changes.
The sun will rise and set, and she needs to remember at times like this that even when it's below the horizon, the moon is shining and it is always there when the sun goes away, that it takes a lifetime to live and a second to die, and every moment should be treasured. We sleep until the next day, yet wake up to remember yesterday, we hold it all in our memory but sometimes it's good to forget and smile.
Sometimes she needs a hand to hold, and that's why there are spaces in between our fingers, so we can give that comfort, sometimes she just needs a hug, and that is why our arms can reach around each other and give that warmth and sometime she just wants to be alone and that is why she sits apart from the crowd, holds onto herself, because she's the best comfort she's got.