I know you may seem like you're the only person in the world that doesn't have a boyfriend but let me assure you that you are not. You do not need a boyfriend to make you, no one needs a partner to make them the person they are.
You're only young, you've got to realize that just because you don't have a boyfriend doesn't mean you're mean or anything negative at all. The most beautiful people (inside & out) I know don't have partners nor do they care because they know single or attached that they are worth a lot.
What you can do is concentrate on yourself & gaining confidence being single. Because once you have the confidence being single & being you the guys will come running as you'll be self-assured.
& also on a last note, you're only young so have fun. Hang out with your friends & enjoy being single. You'll thank yourself for it when you're older!