I do find it weird she can't even pay for things at a till... who is that shy? Doesn't she have to pay for lunches at school and do things independently? Also wasn't there mention she had a credit card? Why a credit card if you can't pay for things. Maybe it was a comment he made to get people out looking for her? I would check with her best friends if she has confided anything in them - whether it is boyfriend trouble, pregnancy, problems with parents... Super scary!