It could mean that she trusts you, values your friendship, or simply wants to share a memorable moment with you. It's a gesture that shows she wants to connect with you on a more personal level.
she's a good girl
Everyone is different, with different agendas, so the only way you will know for sure is to ask her.
Means that the girl became part of the story
He probably really likes you.
You keep it
She must really think you are special
it can mean anything most likely that she likes you but it doesn't have to mean that. if you don't know why or how she has the picture then if i were you i would worry =D
When a girl mentions picture day means that she cannot wait to have her picture taken. She will probably remind everyone about picture day.
When a guy says "she is straight" after seeing a picture of a girl it means that she is straight in nature. She has a preference of males for relationships.
She is generous.
She wants you to call or text her.
opinion question...but i would think that he is interested in her