All around, you will see couples everywhere. You see holding hands, kissing, laughing, etc. All of your friends may have someone that they never shut up about. I can see how that would make a person feel excluded from the circle.
But guess what? We have ALL been there. Every single person knows how it feels to not have a significant other in their lives. The more you think about it, the more it sucks. It may feel like the world is ending, but that should not be the case at all.
This goes out to all ages out there, especially the younger population. There are some out there that believe that they need someone else's hand to hold to be happy. I am so tired of hearing that. A person should not have to feel liked by the opposite sex or even the same sex to be complete in life, especially if you are young.
Who cares if you don't have a serious relationship? Be young, go on multiple dates, and just have fun. Eventually that special someone will come along....you will know when that happens. Just stop worrying about it and live your life. Everyone is a special person and has great friends...spend time with them and once again go out and have some fun!
The point of this is that you do not need someone. Everyone deserves to be happy, but you can be happy with your own person. Be happy with everything you have, not what you don't have. Focus on a bright future and I can bet that everything else will fall right into place.