my ex bestfriend

this is the first time she invites me to go to her event .
I feel happy , sooooo happy . but I'm sure that I'll be seen a few gauche . I don't know why . But I think because we had a problem last time .
Don't you know that I'm a shy girl . I have never can start or terminate a discussion , especially with her .
Now , I'm confuse . what will I give to her this evening ?
this is her sweet seventeen birthday . Last time I gave her a pillow . A blue pillow . I don't know whether she likes it or not .
Let me think about it ..