Please help!!!
Months ago, my daughter had a best friend, a really really good friend that meant a lot to her. She moved in August to a place very far from here. She left us the phone number and address, i kept it in a safe place but i accidently through it away, when she found out she got really angry and had a bad tantrum and said i never cared about her best friend. She has been ok since then but she somtimes tells me that she misses her friend a lot and even though its only been 3 months since she's seen her it feels like 1 year. Yesterday she thought she saw her friends car outside (because they have their friends house nearby they can stay at) and she was really happy but i think they havn't because they would have left a note or something . But now she thinks that her best friend has forgotten her and its all my fault because i lost the phone number. This is breaking my heart because she doesn't like to talk anymore and she's always watching out the window to see if her friend is coming. Her friend meant A LOT to her . What should i say to her to make her feel better?

Could there possibly be anyone else in the area that would also have their contact information? Any other friends that may have this info?

Yes the friends that they can stay at. But i doubt they will, because we don't speak to them very much, but their son and my daughter used to play outside but it's winter so they can't play outside, maybe when it gets warmer she can ask them because i don't know them well i only said hello to them once and thats it so i doubt they will trust us with her phone number.

I think it is up to you to ask if you can get the phone number from the neighbors. You are the one that threw it away. I think if you went to them and explained the situation, that they would be happy to help. Most people would. Put your feeling aside on this and help your daughter to talk to her friend again.
My best friend moved away when I was about her age. I am still friends with her now and I am 49, so you see, this is a friendship worth keeping and you need to help to do that!