Life, especially college life, is a rollercoaster. Some days you may be on top of the world, other days you may feel completely defeated by it. I've definitely felt my fair share of both. Everyone does. It's part of living a real life. There is no such thing as a "perfect" day, week, month, semester, or year. It may seem perfect sometimes, and it may seem the opposite others, but that is OK. That is the way it should be.
Perhaps the most important piece to learn to accept this imperfection is realizing that no matter how great (or awful) life may seem, you are not alone.
That is something I have always struggled with, and I know that I am not the only one. Through the highest highs and the lowest lows, you are never alone. It is easy to "ride the highs," but the worst of the lows are always the hardest to endure.
Maybe it was a tough final that you did not do as well on as you had hoped. Perhaps it was a friendship or relationship that unraveled despite your best attempt to save it. It could be a struggle with your family. No matter how hard it may get, though, know that you are never alone. Never.
Everyone has their own coping strategy when the going gets tough. Some people are vocal, others are not. Some may choose to share what they are going through while others do not. More often than not, it seems to be the latter, and that is part of the problem. The worst part of feeling alone is not knowing that, in fact, you are not the only one feeling this way.
No matter where you are at, whether it is the highest high or the lowest low, do not be ashamed of it. I have done it myself, and trust me, it only makes things worse. Reach out. No matter what you are going through, I am sure that someone you know has felt the same struggle. You may not know it, but you are not alone.
Try your absolute hardest not to let it stop you from being happy. Some of the most fun nights of my life have started out as I was feeling alone. Call a friend, even a distant one. Make plans. Jump on the Xbox, go out on the town, or do whatever it takes to surround yourself with interaction. Try your very hardest to push the low out of your mind, even if just for the night. Relax, revel at the moment, and enjoy. It will get better. I promise.