Dear Lonely Kid,I’ve received your letter.Don’t worry.Here’s some advice that may help you.First,why not ask your friends if you can take part in the party?Maybe they just forgot to invite you.If I were you,I would buy a good present for my best friend.She/ He will be very surprised and happy.Helping your friends plan the party is also a good idea.They will think you are friendly and then they will invite you.On the other hand,you’d better call your best friend and talk about this thing.Listen to her carefully and then maybe you can find out your problem.Finally,don’t be upset anymore and just wait.Maybe your friends want to give you a surprise.I hope my advice can help you.Good