I'm a bit nervous as most of the boys at my school have had sex and i've not.
Hi there and thanks for your question. It's really hard when you feel you've got to do something just because it seems like everyone else is doing it. This seems to happen the most when you're a teenager.
I know that the peer pressure thing can be really strong and that society puts guys under a lot of pressure about being sexually active, but it is your choice when you start having sex. Having sex because you feel you have to is not a good reason to do it.
While you say that most of the guys at your school have had sex, this is actually very unlikely. Many of them would be saying they have had sex. Having worked in schools with guys your age I can tell you that a lot of guys say they have had sex when they haven't because of exactly the kind of pressure you are feeling right now. Studies here in Australia show that in reality, only 50% of people have had sex by the time they are 18.
If there is a girl you really like then you could just try getting to know her better and see if a relationship develops and enjoy the relationship for the sake of the relationship, not to have sex.
Sex for the first time is always the best when you are really ready and want to do it, and when it's with someone that you are close to and care about.
Another possibility for you may be to join the crowd and say you have had sex. While it's probably not the best solution, it could take the pressure off you and help you to avoid doing something you really are not ready to do yet. If you have a trip away somewhere, even a night or weekend in a bigger town you could say that's when and where it happened and you don't want to give details.
Remember, when you are ready to have sex, to use condoms for protection against getting someone pregnant and also sexually transmissible infections (STIs). If you can get hold of some, practice putting them on and masturbating with them on. This can give you a lot more confidence when it comes to using them with a partner.
All the best and take care.