@DashDynamic,
Good God, how young are you. I wish you could have used your recent bravado by confronting the gossips. Telling your friend could make her second guess herself, plus make her unhappy. That means the gossip flingers and gossip apologists win. Don't let gossip go unchallenged when it's shared with you, and since you don't have many friends at this school, protect the reputation and peace of mind of the girl who has befriended you. This is a lesson you Ned to learn when you are young. Gossip is a form of bullying, don't give in to bullies. If you were only asking for advice, why did you need to point out she has a boyfriend (in all caps) after everyone told you to mind your own business? That tells me you are a tad enthralled with the notion some people want to sully the reputation of someone who has befriended you. Gossip can be hard to ignore, for some, the juicier the better. Try to avoid that briar patch.
If you were a little older and mature, you wouldn't think I'm trying to intimidate you, I've just lived longer than you and am crystal clear on the damage gossip can do. Your reaction to my remarks is very typical of today's 15 and 16 year olds. Give yourself time, you will grow up to be a more compassionate adult. Ask your mother what she thinks, I bet she'll tell you the other kids are being jerks and tell you exactly what all the other adults on this thread have told you.