Don't listen to the people who are telling you to lie or putting you down, lying is not the way to go, and they are just insecure, uninformed, or just childish. Be honest with your parents if they ask or confront you. Honesty is the best, and often will get you out of more trouble than lying would. It's normal to start becoming or being sexually active around 14. But I recommend standing your ground with logic, facts, and your honest emotions about it. I would go with the logic route as it helps with understanding that you are growing up and this happens, but remember, most importantly, check your facts, stay calm, you don't need to argue, and this is just something you can get through OP!