What can I do now? Can you help me please?

Try getting a middleman. Have them talk to your friend without directly mentioning you until they magically wind up in front of the location of the party. Explain yourself when your friend is all happy because it's a party.

I would write her a note-yes a good old fashioned on paper note. She cannot just hit deleate or ignore it like an email.

Just tell her that you are sorry you hurt her feelings but that you had to do something really really important that you cannot tell her about now. Say it involves someone else's feelings (her feelings of surprise at the surprise party!) and that is why you cannot disclose where you actually were that day. Tell her that you will tell her all about it as soon as the time is right. (at the party!)

let her know how much you value her friendship and how sad you are that you hurt her feelings. let her know that you really miss hanging with her.

Putting all this on paper will make it mean a lot to her-and will be more meaningful then if you just say it, since she will be reading it she will not be able to argue back with you.

Good Luck!

Have the party at another one of your friends house, then have that friend invite her over for the party,where she will find out, say sorry, and live happily ever after lol

Just tell her something like the reason you can't hang out is important and that what you're doing will make her happy later on.

umm dont give away the secret, just wait for the bday party then she'll understand. if shes still mad she isnt a good friend to begin with. i bet you;ve heard this but its the truth.....hope things get better!!

i think u shud just 'pretend' to ignore her, and then the day of the surprise party, u cud explain everything! :]

I think that if your friendship with her is at stake and you really care for this relationship you should just tell her the truth.