You are taking the day off school because of it? To be perfectly honest if I was her and you confronted me with this I would be pretty worried, you have only been together a month and you sound pretty posessive. People look at people, so what, I bet she looks at Brad Pitt too, who cares. If you are still at school you are what 17 and I assume she is the same which means she was with one of them when she was 16 and the other when she was 15, that's kids stuff, it means nothing, don't worry about it and for gods sake go to school!