I feel a lot more mature than my friends?

Hey...that's good that you're more mature than your age, it's a good thing=) it means you're a thoughtful person, nothing wrong at all. And it is time to grow up anyway, you're growing into become a person/an individual, not a young kid/teenage anymore. Maybe you should hang with more mature people (mature as in mature in mind, some adults can have the mind of a teenager). You're just changing stage of life from being a young teenage to a young adult. Maybe you can join a group where most adults would go? that way you can meet new people, expanding your network,etc..