you can make new friends by trying out inviting this girl. it might be worth it.... I think you should invite her to your party and still be friends: for one thing at least she invited you, maybe she thought you could make new friends at her party. If you can maybe you should invite people she doesn't know so she knows how you felt.
yes they should be able to having a friend should not matter when your birthday or when their birthday is
It's as simple as counting. Get out of your comfort zone. If your having trouble with this step then do something that your not comfortable with like enter the talent show. That should do it.
What should you do if you are uncertain about the flawere while having at a friends?
your friends
Go to an amusement park, or have a birthday party with her friends :)
you should celebrate it with your family and your special friends and with your neighbors!
have a few friends over and have fun
Friends...
The person having the birthday!
I think you should have a prom! Have all your good friends over before and get ready then have your own birthday prom!
UK
If a friend or family is having a 30th birthday, a party should be planned. Their should be decorations and cake that say 'Happy 30th Birthday'.