A guy wants my girlfriend?

my girlfriend is away at band camp for a week and theres this guy that really wants her and showers her with attention. She's getting charmed by it and i feel that shes just getting infatuated instead of the love she feels for me. So the bottom line is he is probably going to ask her out tomarrow and she told me she honestly doesnt know who she will chose, so should i be worried that she will dump me for him?