Because either brothers friends are in love with little sister, or hate little sister because brother does.
You can tell all of her secrets, in the cafeteria you can accidentally dump your food on her, you can steal all of her friends, steal her bf (if she has one), or when Halloween comes you can decorate her house with toilet paper.
leave
Yes he does
Offer to leave her alone on her birthday if she leaves you alone on yours.
I know it may be hard but if he doesn't love you back, leave him alone. Ask him if you can be friends.
leave her alone
Depends if you are friends or not. If not friends then tell her to leave you alone.
Go to Freind house
Leave these people alone.
Just be there for them even if they tell you to leave them alone.
no it will be lonely